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."