definitions

guesstimate

or gues·ti·mate

[ verb ges-tuh-meyt; noun ges-tuh-mit, -meyt ]
/ verb ˈgɛs təˌmeɪt; noun ˈgɛs tə mɪt, -ˌmeɪt /
Informal.
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verb (used with object), guess·ti·mat·ed, guess·ti·mat·ing.

to estimate without substantial basis in facts or statistics.

noun

an estimate arrived at by guesswork.

RELATED WORDS

essentially, nearly, basically, practically, thought, opinion, conjecture, belief, presumption, hunch, hypothesis, thesis, guesswork, supposition, inference, guess, evaluation, projection, assessment, measure

Nearby words

guerrilla warfare, guesclin, guesde, guess, guess again, guesstimate, guesswork, guest, guest beer, guest flag, guest of honor

Origin of guesstimate

1935–40, Americanism; blend of guess and estimate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for guesstimate

guesstimate

guestimate

/ informal /

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