SIN
See also: Appendix:Variations of "sin"
Translingual
Proper noun
SIN
Symbol
SIN
- (international standards, aviation) IATA airport code for Singapore Changi Airport, which serves Singapore, Singapore, Singapore.
English
Proper noun
SIN
Noun
SIN (plural SINs)
- (Canada) Initialism of social insurance number, an identification number issued by the government of Canada.