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Elementary Dictionary
       

sir

 
 
pronunciation:
suhr
part of speech: noun
definition 1: "Sir" is a polite way of addressing a man. It is usually used in place of a name. "Sir" is often used by people who serve other people, such as waiters and store clerks. It is also used by strangers to get a man's attention in a polite way.
Is there anything I can help you with, sir?Excuse me, sir, do you know the time?Sir! I think you dropped your wallet!
definition 2: "Sir" is a title of honor for a knight. It is used in front of his name.
Sir Lancelot became a knight in the court of King Arthur.