Sir - Wikipedia 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-speaking Normans, and which now exists in French only as part of "Monsieur" lit 'my lord'
Sir Definition Meaning | Britannica Dictionary 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 military or police officer, teacher, or master)
SIR Definition Meaning - Merriam-Webster 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
SIR definition and meaning | Collins English Dictionary 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 customer as sir