sir

5 ENTRIES FOUND:

sir

noun \ˈsər\

—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 —used without a name as a form of address at the beginning of a formal letter

Sir —used as a title before the name of a knight or baronet

Full Definition of SIR

1
a :  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
b :  a man of rank or position
2
a —used as a usually respectful form of address
b capitalized —used as a conventional form of address in the salutation of a letter

Origin of SIR

Middle English, from sire
First Known Use: 13th century

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