guess - definition and synonyms

noun [countable] 

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  1. the action of saying what you think is true or will happen, without being certain
    have/make/take a guess:

    Have a guess and then check it on your calculator.

    guess at:

    Take a guess at what’s behind this screen.

    guess as to:

    a guess as to the number of people who might come

    rough guess (=one that is not expected to be accurate):

    At a rough guess, I’d say there were twenty people in the room.

    wild guess (=one that is very unlikely to be accurate):

    OK, I’ll make a wild guess, but I really don’t know.

    good/lucky/inspired guess:

    The researchers made several inspired guesses about how the brain works.

    educated/informed guess (=one that is based on some knowledge):

    I could probably make an educated guess.

    hazard a guess (=make a guess that will probably not be accurate):

    We can only hazard a guess at what happened.