[verb ges-tuh-meyt; noun ges-tuh-mit, -meyt]Informal.
verb (used with object), guess·ti·mat·ed, guess·ti·mat·ing.
to estimate without substantial basis in facts or statistics.
an estimate arrived at by guesswork.
Origin of guesstimate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for guesstimateessentially, nearly, basically, practically, thought, opinion, conjecture, belief, presumption, hunch, hypothesis, thesis, guesswork, supposition, inference, guess, evaluation, projection, assessment, measure
an estimate calculated mainly or only by guesswork
to form a guesstimate of
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