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[v. ges-tuh-meyt; n. ges-tuh-mit, -meyt] /v. ˈgɛs təˌmeɪt; n. ˈgɛs tə mɪt, -ˌmeɪt/ Informal.
verb (used with object), guesstimated, guesstimating.
to estimate without substantial basis in facts or statistics.
an estimate arrived at by guesswork.
Also, guestimate.
Origin of guesstimate
1935-40, Americanism; blend of guess and estimate Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for guesstimate
  • Then they would have inflation expectation at the point where an amortized benefit runs out as a guesstimate to tightening.
  • guesstimate a word's meaning through contextual clues.
  • Order number in the mid six thousands if people want to guesstimate when theirs might arrive.
  • If you examine almost any government statistic or calculation more closely, you will find that it is a guesstimate.
  • Have each group come up with a group guesstimate for the number of pennies in the jar.
  • The monetary property damage estimate for this event is a guesstimate.
  • If you don't know the exact amount you pay for car insurance, for example, use a guesstimate until you can look it up.
British Dictionary definitions for guesstimate


noun (ˈɡɛstɪmɪt)
an estimate calculated mainly or only by guesswork
verb (ˈɡɛstɪˌmeɪt)
to form a guesstimate of
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for guesstimate

1902, a blending of guess (v.) and estimate. Related: Guesstimated; guesstimating. As a noun, from 1906.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for guesstimate



An approximation based on calculation and guesswork


: Let's guesstimate a yield of four percent (1934+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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