guesstimate

or gues·ti·mate

[verb ges-tuh-meyt; noun ges-tuh-mit, -meyt]Informal.

See more synonyms for guesstimate on Thesaurus.com

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.

Origin of guesstimate

1935–40, Americanism; blend of guess and estimate

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for guesstimate

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

British Dictionary definitions for guesstimate

guesstimate

guestimate

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

Word Origin and History for guesstimate

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