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)

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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) …

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. …

Definition of guess verb from the Oxford Advanced Learner's Dictionary. [intransitive, transitive] to try and give an answer or make a judgement about something without being sure of all the …

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Something that is anybody's/anyone's guess is something that is very uncertain or that no one knows. It's anyone's guess what his next book will be about.

I sat through rehearsal after rehearsal trying to think ahead of her and guessing what the next instruction would be.

Synonyms for GUESSING: speculation, theory, guesswork, hypothesis, hypothetical, guess, thesis, dead reckoning; Antonyms of GUESSING: proving, establishing, demonstrating, …