sir

symbol

1. ISO 639-3 language code for Siri.

noun

1. A man of a higher rank or position.

2. A respectful term of address to a man of higher rank or position, particularly: to a knight or other low member of the peerage.

   “Just be careful. He gets whingy now if you don't address him as Sir John.”

3. to a knight or other low member of the peerage.

   “Just be careful. He gets whingy now if you don't address him as Sir John.”

4. to a superior military officer.

   “Sir, yes sir.”

verb

1. To address another individual using "sir".

   “Sir, yes, sir! —Don't you sir me, private! I work for a living!”