Sir is a formal honorific address in English for men, derived from Sire in the High Middle Ages. Both are derived from the old French " Sieur " (Lord), brought to England by the French …

The Society of Interventional Radiology (SIR) is the premier professional organization representing interventional radiologists worldwide. With a legacy of excellence spanning …

The meaning of SIR is a man entitled to be addressed as sir —used as a title before the given name of a knight or baronet and formerly sometimes before the given name of a priest.

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SIR meaning: 1 : used without a name as a form of polite address to a man you do not know; 2 : used without a name as a form of polite address to a man of rank or authority (such as a …

Sir is used at the beginning of a formal letter to a man you do not know: Dear Sir

Definition of sir noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

People sometimes say sir as a very formal and polite way of addressing a man whose name they do not know or a man of superior rank. For example, a shop assistant might address a male …

SIR meaning: 1. You call a man “sir” when you are speaking to him politely: 2. a way of beginning a formal…. Learn more.

Nov 28, 2025 · SIR Form Online Fill up, Download, Submission Guide: SIR, or Special Intensive Revision, is a large-scale verification exercise that the ECI undertakes when it believes the …