Definition of straight adverb from the Oxford Advanced Learner's Dictionary

      

    straight

     adverb
    adverb
    BrE BrE//streɪt//
     
    ; NAmE NAmE//streɪt//
     
    (straighter, straightest)
     
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    not in curve
  1. 1  not in a curve or at an angle; in a straight line Keep straight on for two miles. Can you stretch your arms out straighter? He was too tired to walk straight. I can't shoot straight (= accurately). She looked me straight in the eye.
  2. immediately
  3. 2  by a direct route; immediately Come straight home after school. I was so tired I went straight to bed. She went straight from college to a top job. I'm going to the library straight after the class. I'll come straight to the point—your work isn't good enough.
  4. in level/correct position
  5. 3  in or into a level or vertical position; in or into the correct position Sit up straight! She pulled her hat straight.
  6. honestly
  7. 4honestly and directly I told him straight that I didn't like him. Are you playing straight with me?
  8. without interruption
  9. 5continuously without interruption They had been working for 16 hours straight.
  10. Word Origin Middle English (as an adjective and adverb): archaic past participle of stretch.Idioms
    (straight) from the horse’s mouth
     
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    (informal) (of information) given by somebody who is directly involved and therefore likely to be accurate
    (informal) to stop being a criminal and live an honest life
    hit somebody (straight/right) in the eye
     
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    to be very obvious to somebody
    to be honest and not try to trick somebody  immediately; without delay synonym at once I'll do it straight away.
    straight from the shoulder
     
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    if you say something straight from the shoulder, you are being very honest and direct, even if what you are saying is critical
    (informal) without hesitating She asked him straight off what he thought about it all. (British English, informal) used to ask if what somebody has said is true or to emphasize that what you have said is true I saw it—straight up! to think in a clear or logical way
See the Oxford Advanced American Dictionary entry: straight