cal·cu·late

[kal-kyuh-leyt] verb, cal·cu·lat·ed, cal·cu·lat·ing.
verb (used with object)
1.
to determine or ascertain by mathematical methods; compute: to calculate the velocity of light.
2.
to determine by reasoning, common sense, or practical experience; estimate; evaluate; gauge.
3.
to make suitable or fit for a purpose; adapt (usually used passively and with an infinitive): His remarks were calculated to inspire our confidence.
4.
Chiefly Northern U.S.
a.
to think; guess.
b.
to intend; plan.
verb (used without object)
5.
to make a computation or form an estimate.
6.
to count or rely (usually followed by on or upon ): They calculated on good weather.
00:10
Calculate is one of our favorite verbs.
So is lollygag. Does it mean:
to flee; abscond:
to spend time idly; loaf.

Origin:
1560–70; < Late Latin calculātus reckoned (past participle of calculāre), equivalent to calculus pebble (see calculus) + -ātus -ate1

pre·cal·cu·late, verb (used with object), pre·cal·cu·lat·ed, pre·cal·cu·lat·ing.


1. count, figure, cast. 3. design, plan, intend, mean.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
calculate (ˈkælkjʊˌleɪt) [Click for IPA pronunciation guide]
 
vb
1.  to solve (one or more problems) by a mathematical procedure; compute
2.  (tr; may take a clause as object) to determine beforehand by judgment, reasoning, etc; estimate
3.  (tr; usually passive) to design specifically; aim: the car was calculated to appeal to women
4.  (intr; foll by on or upon) to depend; rely
5.  dialect (US) (tr; may take a clause as object)
 a.  to suppose; think
 b.  to intend (to do something)
 
[C16: from Late Latin calculāre, from calculus pebble used as a counter; see calculus]
 
calculative
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

calculate
1560s, "to compute, to estimate by mathematical means," from L. calculatus, pp. of calculare "to reckon, compute," from calculus (see calculus). Meaning "to plan, devise" is from 1650s. Replaced earlier calculen (mid-14c.), from O.Fr. calculer. Related: Calculable
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Sensors on the interstate will calculate any tolls and automatically deduct the
  proper amount from the driver's prepaid account.
Now the people who compile indices are changing the way in which they calculate
  them to take account of such scarcity.
Tax preparation software will automatically and correctly calculate the amount
  of the rebate recovery credit for you.
Knowing the half-life of the parent isotope, they can calculate how many
  millions of years ago the crystals formed.
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