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activity

[ak-tiv-i-tee]

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noun, plural -ties.

the state or quality of being active: There was not much activity in the stock market today. He doesn't have enough physical activity in his life.

a specific deed, action, function, or sphere of action: social activities.

work, especially in elementary grades at school, that involves direct experience by the student rather than textbook study.

energetic activity; animation; liveliness.

a use of energy or force; an active movement or operation.

EXPAND

normal mental or bodily power, function, or process.

Physical Chemistry. the capacity of a substance to react, corrected for the loss of reactivity due to the interaction of its constituents.

Physics.

the number of atoms of a radioactive substance that disintegrate per unit of time, usually expressed in curies.

radioactivity.

an organizational unit or the function it performs.

COLLAPSE

Origin:
1520–30; (< Middle French ) < Medieval Latin āctīvitās. See active, -ity

Related forms

non·ac·tiv·i·ty, noun, plural -ties.

pre·ac·tiv·i·ty, noun, plural -ties.

su·per·ac·tiv·i·ty, noun, plural -ties.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To activity

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Activity is always a great word to know.

So is doohickey. Does it mean:

a gadget; dingus; thingumbob.

a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.

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Example Sentences

Mergers and acquisitions activity continues to languish this year as the fallout from the economic crisis lingers.

The basis of her firing has to be other than alleged criminal activity.

Since then, however, there has been little activity.

EXPAND

Mergers and acquisitions activity continues to languish this year as the fallout from the economic crisis lingers.

The basis of her firing has to be other than alleged criminal activity.

Since then, however, there has been little activity.

Click for more great links related to this activity.

Visual decoder allows researchers to translate brain wave activity into images.

So variations in solar activity can drive changes in the weather.

Spinosad has both stomach poison and contact activity.

Researchers expose differences in brain activity between people who fib and those who don't.

Four bits of unrelated account activity took place last week.

Significant scholarly and/or related professional activity preferred.

Of course, the state's activity has been vast and important.

Spending time or planning an activity with them are good ways to help them feel safe.

People who find reasons to occupy their time with activity may be happier.

There is always plenty of work to do at a fossil dig, but every now and then there's a lull in the activity.

After our bees swarmed a month ago, there has been less and less activity in the hive.

In other words, it's workout friendly, a must for a device that monitors all of your aerobic activity.

Excellence in teaching, scholarly activity and university/community service are requirements for promotion and tenure.

Brain activity in certain neural systems seemed to reveal a strong correlation with the amount of money at stake.

Sunspots are regions of intense magnetic activity on the sun's surface.

Finally, astrocytes are also the adult stem cell in the brain and control blood flow to regions of brain activity.

Toxoplasma gondii alters activity in a rat's brain.

Remove the landscape flags after a long lapse in activity.

But all this activity could soon come to a grinding halt.

Candidates must also present evidence of an on-going program of scholarly/creative activity.

The activity settled into a pattern of flaring up every now and then before dying back down to a grumble.

You've been asked to increase civic activity in your community.

Answers about how the brain as a whole integrates activity among areas, however, have proved elusive.

The amount of mercury emitted into the atmosphere has tripled, by some estimates, during the past century of industrial activity.

The readings on the syllabus strike the students as an alien activity.

It is a more thought-provoking activity than building sandcastles, with a nice melancholic tinge.

All the subjects showed activity in the region of the brain that processes vibrations.

Besides clearing the ground, the beetles' activity fertilizes the soil.

Evidence of a circadian rhythm for muscle sympathetic nerve activity in humans.

Capital-markets activity tends to be closely linked with overall economic growth.

So they work slightly differently, but they are all boosting the brain or boosting activity in the brain at some level.

She had chosen this quiet stretch, where human activity is strictly managed, to have her young.

Evidence of scholarly activity and effective teaching at the college level required.

Social comparison affects reward-related brain activity in the human ventral striatum.

Research shows that spatial navigation causes telltale electrical activity in the brain.

The storeowners watch the activity with lax interest, slurping tooth-rottingly sweet chai out of thimble-sized cups.

They will concentrate on a few sites that can be studied intensively and which are affected by different types of activity.

The physiological origin of this rumbling involves muscular activity in the stomach and small intestines.

Children's activity and play corner, knowledgeable staff on both the natural history of the area and river ecology.

During the boom much of the construction activity was in flats.

The purposeful collective activity of ants and other social insects does, indeed, look intelligent on the surface.

Volcanic gases can do as much damage as any amount of human activity.

In fact, for those who could afford it, even acquiring a secret secondary was a complex underground activity.

On the other, weak housing investment and high interest rates are likely to have restrained consumer activity.

All this frenetic activity has doubtless generated lots of income for middlemen in the financial sector.

Physical activity also helps the body use calories more.

My main concern is that political activity was taking place during a campus-wide club recruitment day.

Right now, volcanic activity in the crater has closed the road's western half.

Brain scans of a speaker and listener showed their neural activity synchronizing during storytelling.

Observing rate levels and economic activity in isolation is a.

High brain activity in people affected by the tragedy could lead to later health problems.

Jochum suggests setting aside a place where this activity is allowed, such as a sandpit or sandbox.

Fun activity ideas for kids and families, from cool science experiments to crazy jokes.

Encouraging physical activity may be as simple as offering small rewards.

Hands-on activity areas located throughout the museum demonstrate indigenous technology and their environment.

Your brain activity is the physiological substance in which your personality and wishes and desires operate," he said.

The brain generates an electric field that influences its own activity.

On this particular rainy fall afternoon, however, the auditorium is quiet-though not for lack of activity.

By eavesdropping on the activity of single neurons in the human brain,.

Gutchess and her team map the activity inside their heads while they are thinking of a response.

It might unlock the mental prisons of people apparently in comas, who nevertheless show some signs of neural activity.

Arndt suggests they might have been subconsciously attempting to dispel a negative mood with an enjoyable activity.

What if global warming is a reality, and expanding human activity is.

But the real activity has been in the secondary market.

Guys can lower their brain activity in hunger regions on command.

Balmer writes as a believer deeply troubled by the political activity of his coreligionists.

New sleep aids block the activity of brain peptides called orexins, which play a role in addiction.

The weight took its toll on his physical activity as well.

The ethical value of the social solidarity that such activity affirms further enriches university life.

In that organ, such changes correspond to increases and decreases in mental activity.

Both observed mysterious activity that produced clear areas in agar plates otherwise cloudy with thriving bacteria.

Desirable: post-doctoral experience, experience teaching undergraduates, and evidence of scholarly activity and potential.

Although some security experts think hacking activity has hit a new high, others say such claims are overblown.

Laughter and cheers cause a buzz of activity in brain regions that control facial movement.

The towers then communicate real-time information on the locations and activity levels of the animals to an on-site laboratory.

My research has found that binge drinking is a highly social activity.

Like all law-enforcement officers, they are required to report any criminal activity they witness on the job.

Noise from human activity threatens an animal's reproductive success.

But whatever you do during this family-friendly activity be sure to soak up the history.

The scientific evidence that the earth is getting warmer, and that human activity is at least.

Once brawny muscles have been acquired, whether licitly or illicitly, other genes might then be used to tune their activity.

Such abundant geothermal activity offers evidence of.

Measured brain function in brain scans showed more activity.

Gene activity varies within each person, across the life span, and in response to changing environments.

People living in the countryside had the lowest levels of activity in their amygdalas.

Implanted electrodes recorded activity in the motor cortex regions of the animals' brains while they performed the task.

Fatal attacks are not more likely among any age group or in response to any specific human activity.

That's when the committee took a look at their online activity.

During the second type, there was enhanced activity in the areas responsible for the release of endorphins, too.

Scientists have long hunted for a pattern of brain activity that signals consciousness, but a reliable marker has proved elusive.

So it is not so much a problem of evolution, but a human activity that causes the problem.

Agencies typically look for people with expertise in the field of activity that a given round of proposals will support.

But occasionally the curtain twitches, exposing frantic activity behind the.

Research finds that increased brain activity in key areas is tightly linked to an ability to control the.

But her activity declined and the keepers noticed that the animal's chest, limbs and abdomen were swelling.

The sheer degree of global activity in higher education is extraordinary.

Not to mention the increased economic activity which they would bring elsewhere.

Maltreatment can have enduring effects on a child's developing brain, diminishing growth and reducing activity in key areas.

Modulation of muscle sympathetic nerve activity to muscle heating.

Eventually osteoclastic activity wins out, and that is literally the breaking point.

Representing vast amounts of data is a vital activity and more and more academics are turning to them as pedagogic aids.

They also found that the pattern of activity changed as they changed the pattern of features on a face.

The science is clear: the climate is changing thanks to human activity.

Travel times to any activity are usually problematic because they add extra to the total time of the activity itself.

It is a leading indicator of international trade and, by extension, of economic activity.

Likewise, different patterns of brain activity emerged under the two.

Nigeria has been famous for its fraudulent internet activity and hacking.

They may also alter gene activity through what are termed epigenetic changes.

One, taken from a relative of the cod called the ocean pout, promotes the activity of the gene that encodes growth hormone.

COLLAPSE

Collins

World English Dictionary

activity (ækˈtɪvɪtɪ)

—n , pl -ties
1.	the state or quality of being active
2.	lively action or movement
3.	any specific deed, action, pursuit, etc: recreational activities
4.	the number of disintegrations of a radioactive substance in a given unit of time, usually expressed in curies or disintegrations per second
5.	a. the capacity of a substance to undergo chemical change
	b. the effective concentration of a substance in a chemical system. The absolute activity of a substance B, λ_B, is defined as exp (μ_BRT) where μ_B is the chemical potential

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

activity

1540s, "state of being active," from Fr. activité, from M.L. activitatem (nom. activitas), a word in Scholastic philosophy, from L. activus (see active). Meaning "state of being active, briskness, liveliness" recorded from 1520s. Activities in schoolwork sense is from 1923, Amer. Eng.

American Heritage

Medical Dictionary

activity ac·tiv·i·ty (āk-tĭv'ĭ-tē)
n.

A physiological process.
The presence of neurogenic electrical energy in electroencephalography..
An ideal concentration for which the law of mass action will apply perfectly.
The intensity of a radioactive source.
The ability to take part in a chemical reaction.

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"... if the Settlement seeks its expression through social activity, it must learn the difference between mere social unrest and spiritual impulse."

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