Dictionary.com
definitions
  • synonyms

guesstimate

or gues·ti·mate

[verb ges-tuh-meyt; noun ges-tuh-mit, -meyt]Informal.
See more synonyms on Thesaurus.com
verb (used with object), guess·ti·mat·ed, guess·ti·mat·ing.
  1. to estimate without substantial basis in facts or statistics.
Show More
noun
  1. an estimate arrived at by guesswork.
Show More

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

British Dictionary definitions for guesstimate

guesstimate

guestimate

noun (ˈɡɛstɪmɪt)
  1. an estimate calculated mainly or only by guesswork
Show More
verb (ˈɡɛstɪˌmeɪt)
  1. to form a guesstimate of
Show More
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

v.

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

Show More
Online Etymology Dictionary, © 2010 Douglas Harper