The meaning of GUESS is to form an opinion of from little or no evidence. How to use guess in a sentence.

Phrasal verb guess at something (Definition of guessing from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Guessing is the act of drawing a swift conclusion, called a guess, from data directly at hand, which is then held as probable or tentative, while the person making the guess (the guesser) admittedly lacks …

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To assume, presume, or assert (a fact) without sufficient information. 2. To form a correct estimate or conjecture of: guessed the answer. 3. To suppose; think: I guess he was wrong. 1. To make an …

guessing Other forms: guessings Definitions of guessing noun an estimate based on little or no information synonyms: dead reckoning, guess, guesswork, shot