sir - definition and synonyms

 
 strong

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/sɜː(r)/
 weak

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/sə(r)/
  1. 1
    spoken used as a polite way of speaking to a man. This word can be used by someone who works in a shop or restaurant for speaking to a customer, by someone speaking to a senior officer, or by someone speaking to another person whose name they do not know

    That’ll be £5.50, please, sir.

    Would you like a drink, sir?

    Excuse me sir, do you know what the time is?

     Synonyms and related words
    1. a.
      American used by a boy or young man as a polite way of speaking to an older man

      Does your mother know about this?’ ‘No, sir.’

       Synonyms and related words
  2. 2

    Sir

    used before the name of a man who is a knight or baronet
     Synonyms and related words
  3. 3
    British spoken used by students for talking to or about a male teacher

    Sir, may I go to the toilet?

    If you don’t know the answer, ask sir.