1. Expect to be true; believe
   "I guess she is angry at me for standing her up";
   - think, opine, suppose, imagine, reckon, dare say [informal], daresay [informal]
    
2. Say or suggest something without being certain
   "I am guessing that the price of real estate will rise again"; "He hazarded a guess about the outcome";
   - venture, pretend, hazard
    
3. Guess correctly; solve by guessing
   "He guessed the right number of beans in the jar and won the prize";
   - infer
    
4. Form an opinion or estimate without sufficient information
   "I can only guess what he meant"

1. An estimate based on little or no information
   "His guess about the project cost was way off";
   - guesswork, guessing, shot, dead reckoning
    
2. A message expressing an opinion based on incomplete evidence
   "His guess about the company's future proved to be incorrect";
   - conjecture, supposition, surmise, surmisal, speculation, hypothesis

Derived forms: guessed, guesses, guessing

Type of: anticipate, approximation, estimate, estimation, expect, figure out, idea, lick [N. Amer, informal], muse, opinion, puzzle out, solve, speculate, suss [Brit, informal], suss out [Brit, informal], unriddle, view, work, work out

Encyclopedia: Guess, George