Definitions of guesstimate
  1. noun
    an estimate that combines reasoning with guessing
    synonyms: guestimate
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    type of:
    approximation, estimate, estimation, idea
    an approximate calculation of quantity or degree or worth
  2. verb
    estimate based on a calculation
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    type of:
    approximate, estimate, gauge, guess, judge
    judge tentatively or form an estimate of (quantities or time)
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