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 exist in French only as part of "Monsieur", with the equivalent "My Lord" in English. [citation needed]

Dec 8, 2016 · 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. How to use sir in a sentence.

used to begin a formal letter to a man whose name you do not know. "Dear Sirs" is an old fashioned way of beginning a letter to a company: Dear Sir, I am writing in response to your …

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)

Use the word sir as a formal title for a man. People often use sir to respectfully or politely address someone they don't know well. When you're saying hello to a man who's been knighted by the …

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.

Definition of sir noun from the Oxford Advanced Learner's Dictionary. used as a polite way of addressing a man whose name you do not know, for example in a shop or restaurant. Good morning, sir. Can I help you? Are you ready to order, sir? ‘Thank you very much.’ ‘You're welcome, sir. Have a nice day.’. Want to learn more? Thank you, Sir Paul.