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Added 9 October 2026

sir

/sɜː/ noun

In Latin: dominus, domine Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about sir at Wordnik → Where our words come from →

Term of address for a man.
A title used before the name of knight or baronet.

Origin

From Middle English sir, unstressed form of sire, borrowed from Old French sire (“master, sir, lord”), from Latin senior (“older, elder”), from senex (“old”). Doublet of seigneur, seignior, senhor, senior, señor, senyor, signore, and sire.

From Wiktionary, via Kaikki.org (CC BY-SA)

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