A2nounformal2K

Sir

UK /["/sɜː(r)//sə(r)/"]/US /["/sɜːr//sər/"]/

Definition

used as a polite way of addressing a man whose name you do not know, for example in a shop or restaurant

In simple words: A polite way to address a man.

Examples

  • The teacher asked the students to address him as 'Sir'.
  • In the military, all officers are referred to as 'Sir' by the soldiers.
  • He was knighted and is now known as Sir John.
  • When speaking to a waiter, it's polite to refer to him as 'Sir' if you don’t know his name.

Usage notes

Used in formal situations or when showing respect, often in business or military contexts. Not appropriate in casual settings or when addressing friends.

Grammar pattern

standalone greeting

Memory hint

Think of a knight saying 'Sir!' to show respect.

Collocations

  • yes, sir
  • good morning, sir
  • excuse me, sir

Synonyms

  • mister
  • gentleman
  • lord

Antonyms

  • fool
  • commoner

Common mistakes

  • Using 'sir' in informal situations.
  • 'Sir' is sometimes confused with 'mister'.
  • Learners may forget to capitalize 'Sir' when used as a title.