noun

sir

sir

Yes, sir, I understand.

Yes, sir, I understand.

Excuse me, sir, is this seat taken?

Excuse me, sir, is this seat taken?

Dear Sir, I am writing to you...

Dear Sir, I am writing to you...

((as a form of address)) a polite term for a man. Excuse me, sir.

mister, gentleman

From Old French 'sire', from Latin 'senior' meaning 'elder'.

Imagine a knight saying 'Yes, sir!' to a king. It's a term of respect.

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