guess

Syllabification: (guess)

Pronunciation: /ges/

Definition of guess

[with object]

estimate or suppose (something) without sufficient information to be sure of being correct:she guessed the child’s age to be 14 or 15 [with clause]:he took her aside, and I guessed that he was offering her a job
(guess at) make a conjecture about:their motives he could only guess at
correctly conjecture or perceive: [with clause]:she’s guessed where we’re going
(I guess) informal used to indicate that although one thinks or supposes something, it is without any great conviction or strength of feeling: [with clause]:I guess I’d better tell you everything

an estimate or conjecture:my guess is that within a year we will have a referendum

Phrases

anybody's (or anyone's) guess: very difficult or impossible to determine:how well the system will work is anybody’s guess
keep someone guessing: informal leave someone uncertain or in doubt as to one’s intentions or plans.

Middle English: origin uncertain; perhaps from Dutch gissen, and probably related to get

Spell guess with -ue- after the g and a double s at the end.

Definition of guess in the British & World English dictionary