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Definition of hey exclamation from the Oxford Advanced Learner's Dictionary

hey

exclamation
 
/heɪ/
 
/heɪ/
(informal)Idioms
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  1. used to attract somebody’s attention or to express interest, surprise or anger
    • Hey, can I just ask you something?
    • Hey, leave my things alone!
  2. (especially North American English, informal) used to say hello synonym hi
    • Hey, Jake! How are you doing?
  3. used to show that you do not really care about something or that you think it is not important
    • That's the third time I've been late this week—but hey!—who's counting?
  4. (South African English) used at the end of a statement, to show that you have finished speaking, or to form a question or invite somebody to reply
    • Thanks for your help, hey.
    • My new bike's nice, hey?
  5. Word Originnatural exclamation: first recorded in Middle English.
Idioms
what the hey!
  1. (North American English, informal) used to say that something does not matter or that you do not care about it
    • This is probably a bad idea, but what the hey!
See hey in the Oxford Advanced American Dictionary

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