Real Dictionary

sin
countable noun: A sin is any action or behaviour that people disapprove of or consider morally wrong.
variable noun: Sin or a sin is an action or type of behaviour which is believed to break the laws of God.
verb: If you sin, you do something that is believed to break the laws of God.

SIN in American English
Social Insurance Number: in Canada, an individual number containing nine digits and used by the government to identify a person for the paying of taxes and the receipt of pensions and other government benefits
noun: the 12th letter of the Arabic alphabet
noun: the Akkadian god of the moon: the counterpart of the Sumerian Nanna

sin in American English 1
an offense against God, religion, or good morals
intransitive verb: to commit a sinful act
noun: transgression of divine law
transitive verb: to commit or perform sinfully

sin in American English 2
the twenty-first letter of the Hebrew alphabet (שׂ)
noun: the 22nd letter of the Hebrew alphabet

sin in American English 3
abbreviation: sine

sin in American English 4
symbol: arc sine

SIN in British English
abbreviation for: social insurance number

sin in British English 1
noun: transgression of God's known will or any principle or law regarded as embodying this

sin in British English 3
noun: a variant of shin, the 21st letter in the Hebrew alphabet (שׂ), transliterated as S

sin in British English 4
abbreviation for: sine