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

      

    please

     exclamation
    exclamation
    BrE BrE//pliːz//
     
    ; NAmE NAmE//pliːz//
     
     
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  1. 1  used as a polite way of asking for something or telling somebody to do something Please sit down. Two coffees, please. Quiet please! Please could I leave early today? Express YourselfAsking for somethingWhether you are in shops or restaurants or in somebody's home, you can use polite questions to get what you want: Could I have a glass of water, please? Do you have any decaffeinated coffee? I'd like tea with sugar, please. I'll have the pasta with salad, please.Responses: Certainly. I'm sorry, we don't have any left. Yes of course. Here you are/​go.
  2. 2  used to add force to a request or statement Please don't leave me here alone. Please, please don't forget. Please, I don't understand what I have to do.
  3. 3  used as a polite way of accepting something ‘Would you like some help?’ ‘Yes, please.’ ‘Coffee?’ ‘Please.’
  4. 4Please! (informal, often humorous) used to ask somebody to stop behaving badly Children, please! I'm trying to work. John! Please!
  5. 5Please/P-lease
    BrE BrE//pəˈliːz//
     
    ; NAmE NAmE//pəˈliːz//
     
    used when you are replying to somebody who has said something that you think is stupid Oh, please! You cannot be serious.
  6. Word Origin Middle English: from Old French plaisir ‘to please’, from Latin placere.
See the Oxford Advanced American Dictionary entry: please