Definition of guess verb from the Oxford Advanced Learner's Dictionary

      

    guess

     verb
    verb
    BrE BrE//ɡes//
     
    ; NAmE NAmE//ɡes//
     
    Verb Forms present simple I / you / we / they guess
    BrE BrE//ɡes//
     
    ; NAmE NAmE//ɡes//
     
    he / she / it guesses
    BrE BrE//ˈɡesɪz//
     
    ; NAmE NAmE//ˈɡesɪz//
     
    past simple guessed
    BrE BrE//ɡest//
     
    ; NAmE NAmE//ɡest//
     
    past participle guessed
    BrE BrE//ɡest//
     
    ; NAmE NAmE//ɡest//
     
    -ing form guessing
    BrE BrE//ˈɡesɪŋ//
     
    ; NAmE NAmE//ˈɡesɪŋ//
     
     
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  1. 1  [intransitive, transitive] to try and give an answer or make a judgement about something without being sure of all the facts I don't really know. I'm just guessing. guess at something We can only guess at her reasons for leaving. + adj. He guessed right/wrong. guess (that)… I'd guess that she's about 30. guess where, who, etc… Can you guess where I've been? guess something Can you guess his age? Express YourselfSpeculatingIn some exams, you have to talk about what you can see in a picture and speculate about the situation or a wider issue prompted by the picture. These are ways of saying what you think might be the case: I think it's likely that these people know each other. I imagine she's his wife. They might/​may/​could be related.(British English or formal, North American English) I would think/​imagine/​guess they've been waiting for some time.(British English) I guess that the car has broken down.(North American English) I think this has probably happened before. It looks to me as though the woman is very angry. Perhaps/​Probably/​Possibly/​It may be that/​Maybe there has been an accident.(British English or formal, North American English)
  2. 2  [transitive] to find the right answer to a question or the truth without knowing all the facts guess something She guessed the answer straight away. guess what, where, etc… You'll never guess what she told me. guess (that)… You would never guess (that) she had problems. She’s always so cheerful. see also second-guess
  3. 3  I guess [transitive, intransitive] guess (that)… (informal, especially North American English) to suppose that something is true or likely I guess (that) you’ll be looking for a new job now. I guess I'm just lucky. ‘He didn't see me, I guess.’ ‘Are you ready to go?’ ‘Yeah, I guess so.’ ‘They aren't coming, then?’ ‘I guess not.’
  4. 4  guess…! [transitive] used to show that you are going to say something surprising or exciting guess something Guess what! He's asked me out! guess who, where, etc… Guess who I've just seen!
  5. Word Origin Middle English: origin uncertain; perhaps from Dutch gissen, and probably related to get.Extra examples I was only guessing at her age. If you haven’t already guessed, I’m going out with Steve. If you think I’m lying, well guess again. It’s not hard to guess where they went. Jane had guessed wrong about who was responsible for the fire. She guessed from his expression that he had not won. So it was Rob who broke the window? I might have guessed! That’s not the answer. Guess again. We can only guess how fast a dinosaur might have run. What star sign are you? No, let me guess. You can probably guess how she reacted! You’ll never guess what she told me. You’ll never guess who I saw yesterday! an easily guessed password ‘Are you coming with us?’ ‘I guess so ’ ‘Can I have another cookie ‘I guess so, but that’s the last one.’ ‘Do you really love her?’ ‘I guess so ’ Guess how long it took me to get here. Guess who’s here! He didn’t see me, I guess. He guessed right/​wrong. How old do you think I am? Go on, guess! I don’t really know. I’m just guessing. I guess (that) you’ll be looking for a new job now. I guess I’m just lucky. I guess you’re mad at me. I guessed from John’s expression that something was badly wrong. I guessed, rightly, that the keys would be under the doormat. I’d guess that she’s about 30. If you can guess my age, I’ll buy you a drink! It’s impossible to guess what they might have been feeling. It’s not hard to guess who he’s gone to see. We can’t begin to guess his reasons. What did you get her for Christmas? Let me guess. You’ll never guess where they’ve gone.Idioms (informal) to not tell somebody about your plans or what is going to happen next It's the kind of book that keeps you guessing right to the end.
See the Oxford Advanced American Dictionary entry: guess