sir noun Meaning, definition in Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of "sir" - English Dictionary

See all translations

sirnoun [as form of address]

uk   /sɜːr/  us   /sɝː/ (also Sir) formal
B1 used as a formal and polite way of speaking to a man, especially one who you are providing a service to or who is in a position of authority: Would you like to see the menu, sir? "Did you hear what I said?" "Yes, Sir."
Compare
mainly UK sometimes used by children to address or refer to teachers who are men: Can I go to the toilet, sir? Indian English used after the name of a man, especially one who is in a position of authority, in order to be polite or show respect: John SirDear Sir B2 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 or Madam used to begin a formal letter when you do not know if the person you are writing to is a man or a woman
More examples
Idioms
(Definition of sir noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of sir?
Add Cambridge dictionaries to your browser to your website

Definitions of “sir” in other dictionaries

Word of the Day
post

something such as a message or picture that you publish on a website or using social media

Word of the Day

July 4th, Bastille Day, and the language of revolution.
July 4th, Bastille Day, and the language of revolution.
by Liz Walter,
July 01, 2015
With America’s Independence Day on the 4th and France’s Bastille Day on the 14th, July certainly has a revolutionary theme, so this blog looks at words and phrases we use to talk about the dramatic and nation-changing events that these days celebrate. In particular, it focuses on one of the most important

Read More 

burger noun
burger noun
June 29, 2015
a menu on a computer screen comprising three short parallel horizontal lines which the user clicks to see options Definitely use a burger. You could put the settings in the burger menu too. Fix the settings to the bottom of the burger menu and use a vertically scrolling contact list that scrolls behind

Read More