Definition of "Guess" :
noun: an estimate based on little or no information
noun: a message expressing an opinion based on incomplete evidence
verb: expect, believe, or suppose
"I guess she is angry at me for standing her up."
verb: guess correctly; solve by guessing
"He guessed the right number of beans in the jar and won the prize."
verb: judge tentatively or form an estimate of (quantities or time)
verb: put forward, of a guess, in spite of possible refutation
"I am guessing that the price of real estate will rise again."