thir

Determiner

their

1. Belonging to, from, of, or relating to, them (plural).
   • they will meet tomorrow at their convenience
2. Belonging to someone (one person, singular), or occasionally to something.
   • There's not a man I meet but doth salute me
     As if I were their well-acquainted friend […]c. 1594 (date written), William Shakespeare, “The Comedie of Errors”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount...

Noun

sir (plural sirs)

1. A man of a higher rank or position.
2. A respectful term of address to a man of higher rank or position, particularly
   • Jeeves: Foreign travel often liberates emotions best kept in check, sir. The air of North America is notoriously stimulating in this regard, as witness the regrettable behavior of its inhabitants in 1776.
     B. Wooster: Hm? What happened in 1776, Jeeves?
     Jeeves: I prefer not to dwell on it, if it's...1991 May 12, “Kidnapped!”, in Jeeves and Wooster, Series 2, Episode 5
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.
5. to a teacher.
   • Here's my report, sir.
6. A respectful term of address to an adult male (often older), especially if his name or proper title is unknown.
   • Excuse me, sir, do you know the way to the art museum?

See all 9 meanings of sir