guess-v; 2 Senses

Sense Number 1: think, suppose, casually say

I guess I'll have the steak.
I guess she is angry at me for standing her up.
He guessed that he would do the same again.
Looking in the mirror at his sharp raccoon teeth, he guessed that he probably would eat meat.

VerbNet: NM
FrameNet: NM
PropBank: guess.01
WordNet 3.0 Sense Numbers: 1

Sense Number 2: predict, estimate, make a conclusion about an unknown

Jackie Chan said he guessed two of the Olympic mascots before they were unveiled.
Who could have guessed that she would grace the covers of major magazines?
Ever guessed who is about to call you?
Be sure to use a password that would not be easily guessed.
23% guessed that the image was some kind of sea or ocean creature.

VerbNet: conjecture-29.5-1,discover-84,estimate-34.2
FrameNet: Coming_to_believe
PropBank: guess.01
WordNet 3.0 Sense Numbers: 2, 3, 4