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active

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ac⋅tive

  [ak-tiv]
Use active in a Sentence
–adjective
1. engaged in action; characterized by energetic work, participation, etc.; busy: an active life.
2. being in a state of existence, progress, or motion: active hostilities.
3. involving physical effort and action: active sports.
4. having the power of quick motion; nimble: active as a gazelle.
5. characterized by action, motion, volume, use, participation, etc.: an active market in wheat; an active list of subscribers.
6. causing activity or change; capable of exerting influence (opposed to passive ): active treason.
7. effective (opposed to inert ): active ingredients.
8. Grammar. noting or pertaining to a voice of verbal inflection in which typically the subject of the sentence is represented as performing the action expressed by the verb (opposed to passive ): Writes in He writes a letter every day is an active verb form.
9. requiring or giving rise to action; practical: an active course.
10. (of a volcano) in eruption.
11. Accounting. profitable; busy: active accounts.
12. requiring personal effort or attention; not automatic: an active alarm system.
13. interest-bearing: active paper.
14. Medicine/Medical. acting quickly; producing immediate effects: active remedies.
15. Sociology. (of a crowd) engaging in purposeful activity, often of a militant nature. Compare expressive (def. 4).
16. Aerospace. able to transmit signals: an active communications satellite.
17. Electronics. (of a device or system) acting as a source of electrical energy, as a generator, or capable of amplifying or converting voltages or currents, as a transistor or diode.
18. (of a solar heating system) accumulating and distributing solar heat by mechanical means.
19. Military. serving on active duty.
–noun
20. Grammar.
a. the active voice.
b. a form or construction in the active voice.
21. an active person, member, subscriber, etc.: The circular was mailed only to the actives on our list.
22. Informal. something showing considerable action or activity: On the stock market there was heavy trading in the actives.
Origin:
1300–50; < L āctīvus (see act, -ive ); r. ME actif < MF < L

Related forms:
ac⋅tive⋅ly, adverb
ac⋅tive⋅ness, noun

Synonyms:
1. acting; working; operative. 3. Active, energetic, strenuous, vigorous imply a liveliness and briskness in accomplishing something. Active suggests quickness and diligence as opposed to laziness or dilatory methods: an active and useful person. Energetic suggests forceful and intense, sometimes nervous, activity: conducting an energetic campaign. Strenuous implies arduous and zealous activity with a sense of urgency: a strenuous effort. Vigorous suggests strong, effective activity: using vigorous measures to accomplish an end. 4. agile, sprightly.

Antonyms:
1. lazy. 5. sluggish.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ac·tive   (āk'tĭv)   
adj.  

  1. Being in physical motion: active fish in the aquarium.

  2. Functioning or capable of functioning.

    1. Marked by energetic activity; busy: active stock and bond markets; spent an active day sightseeing.

    2. Involving or requiring physical exertion and energy: an active workout at the gym.

    3. Being in a state of action; not quiescent: active hostilities along the border.

    4. Erupting or liable to erupt; not dormant: an active volcano.

    5. Marked by or involving direct participation: took an active interest in politics; played an active role on the committee.

    6. Currently in use or effect: an active membership.

    7. Openly acknowledged or expressed: an active dislike of the new neighbors.

    8. Indicating that the subject of the sentence is performing or causing the action expressed by the verb. Used of a verb form or voice.

    9. Expressing action rather than a state of being. Used of verbs such as run, speak, and move.

    10. Being a source of electrical energy, as a generator.

    11. Capable of converting or amplifying voltages or currents, as a diode or transistor.

    1. Being in a state of action; not quiescent: active hostilities along the border.

    2. Erupting or liable to erupt; not dormant: an active volcano.

    3. Marked by or involving direct participation: took an active interest in politics; played an active role on the committee.

    4. Currently in use or effect: an active membership.

    5. Openly acknowledged or expressed: an active dislike of the new neighbors.

    6. Indicating that the subject of the sentence is performing or causing the action expressed by the verb. Used of a verb form or voice.

    7. Expressing action rather than a state of being. Used of verbs such as run, speak, and move.

    8. Being a source of electrical energy, as a generator.

    9. Capable of converting or amplifying voltages or currents, as a diode or transistor.

    1. Marked by or involving direct participation: took an active interest in politics; played an active role on the committee.

    2. Currently in use or effect: an active membership.

    3. Openly acknowledged or expressed: an active dislike of the new neighbors.

    4. Indicating that the subject of the sentence is performing or causing the action expressed by the verb. Used of a verb form or voice.

    5. Expressing action rather than a state of being. Used of verbs such as run, speak, and move.

    6. Being a source of electrical energy, as a generator.

    7. Capable of converting or amplifying voltages or currents, as a diode or transistor.

  6. Producing an intended action or effect: active ingredients.

  7. Grammar

    1. Indicating that the subject of the sentence is performing or causing the action expressed by the verb. Used of a verb form or voice.

    2. Expressing action rather than a state of being. Used of verbs such as run, speak, and move.

    3. Being a source of electrical energy, as a generator.

    4. Capable of converting or amplifying voltages or currents, as a diode or transistor.

  8. Producing profit, interest, or dividends: active accounts; active stocks.

  9. Electronics

    1. Being a source of electrical energy, as a generator.

    2. Capable of converting or amplifying voltages or currents, as a diode or transistor.

  10. Being on full military duty and receiving full pay.

n.  

  1. Grammar

    1. The active voice.

    2. A construction or form in the active voice.

  2. A participating member of an organization: union actives.


[Middle English actif, from Old French, from Latin āctīvus, from āctus, past participle of agere, to drive, do; see ag- in Indo-European roots.]
ac'tive·ly adv., ac'tive·ness n.
Synonyms: These adjectives mean engaged in activity. Active means moving, doing, or functioning: an active toddler; an active imagination; saw active service in the army.
Energetic suggests sustained enthusiastic activity: an energetic competitor.
Dynamic connotes energy and forcefulness that often inspires others: a dynamic leader.
Vigorous implies healthy strength and robustness: a vigorous crusader against drunk driving.
Lively suggests animated alertness: a lively interest in politics.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

active 
1340, from L. activus, from actus (see act). Activity is attested from 1530. Activism "a doctrine of advocating energetic action" is first attested 1920; activist in this sense is from 1915.
Online Etymology Dictionary, © 2001 Douglas Harper
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Financial Dictionary

active

Of or relating to a security in which there is a great deal of trading. Active securities appeal to many investors because they usually can be traded without affecting the price. In over-the-counter trading, an active security usually has a smaller spread between the bid and ask price. See also most-active stocks.

Wall Street Words: An A to Z Guide to Investment Terms by David L. Scott.
Copyright © 2003. Published by Houghton Mifflin.
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Legal Dictionary

Main Entry: ac·tive
Function: adjective
1 : characterized or accomplished by action or effort <active concealment> —compare PASSIVE
2 : engaged or participating in action or activity active parent>
Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
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Medical Dictionary

Main Entry: ac·tive
Pronunciation: 'ak-tiv
Function: adjective
1 : capable of acting or reacting especially in some specific way active enzyme> <active nitrogen>
2 : tending to progress or to cause degeneration <active tuberculosis>
3 : exhibitingoptical activity
4 : requiring the expenditure of energy <active absorptive mechanisms for transporting substances from the intestine into the blood> —ac·tive·ly adverb
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Abbreviations & Acronyms
ACTIVE
advanced controls technology for integrated vehicles
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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