sir

[ sur ]
/ sɜr /

noun

a respectful or formal term of address used to a man: No, sir.
(initial capital letter) the distinctive title of a knight or baronet: Sir Walter Scott.
(initial capital letter) a title of respect for some notable personage of ancient times: Sir Pandarus of Troy.
a lord or gentleman: noble sirs and ladies.
an ironic or humorous title of respect: sir critic.
Archaic. a title of respect used before a noun to designate profession, rank, etc.: sir priest; sir clerk.

Origin of sir

1250–1300; Middle English; unstressed variant of sire
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sir

British Dictionary definitions for sir (1 of 2)

sir

/ (sɜː) /

noun

a formal or polite term of address for a man
archaic a gentleman of high social status

Word Origin for sir

C13: variant of sire

British Dictionary definitions for sir (2 of 2)

Sir

/ (sɜː) /

noun

a title of honour placed before the name of a knight or baronetSir Walter Raleigh
archaic a title placed before the name of a figure from ancient history

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012