sin

¹ American  

[sin] / sɪn /

noun

1. transgression of divine law.

   the sin of Adam.

   Synonyms:

   violation, trespass, misdeed

2. any act regarded as such a transgression, especially a willful or deliberate violation of some religious or moral principle.

   Synonyms:

   wickedness, wrong

3. any reprehensible or regrettable action, behavior, lapse, etc.; great fault or offense.

   It's a sin to waste time.

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verb (used without object)

sinned, sinning

1. to commit a sinful act.

   Synonyms:

   trespass, transgress

2. to offend against a principle, standard, etc.

verb (used with object)

sinned, sinning

1. to commit or perform sinfully.

   He sinned his crimes without compunction.

2. to bring, drive, etc., by sinning.

   He sinned his soul to perdition.

sin ² American  

[seen] / sin /

noun

1. the 22nd letter of the Hebrew alphabet.

2. the consonant sound represented by this letter.

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sin ³ American  

abbreviation

Trigonometry.

1. sine.

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sīn ⁴ American  

[seen] / sin /

noun

1. the 12th letter of the Arabic alphabet.

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Sin ⁵ American  

[seen] / sin /

noun

1. the Akkadian god of the moon: the counterpart of the Sumerian Nanna.

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SIN ¹ British  

abbreviation

1. social insurance number

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sin ² British  

/ siːn /

noun

1. a variant of shin, the 21st letter in the Hebrew alphabet (שׂ), transliterated as S See shin 2

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sin ³ British  

/ sɪn /

preposition

1. a Scot dialect word for since

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sin ⁴ British  

/ sɪn /

noun

1. theol

   1. transgression of God's known will or any principle or law regarded as embodying this

   2. the condition of estrangement from God arising from such transgression See also actual sin mortal sin original sin venial sin

2. any serious offence, as against a religious or moral principle

3. any offence against a principle or standard

4. informal (of an unmarried couple) to live together

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verb

1. theol to commit a sin

2. (usually foll by against) to commit an offence (against a person, principle, etc)

sin ⁵ British  

/ saɪn /

abbreviation

1. sine

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sin Scientific  

1. Abbreviation of sine

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sin Idioms  

1. see live in sin; more sinned against than sinning; multitude of sins; ugly as sin; wages of sin.

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Related Words

See crime.

Other Word Forms

• sinlike adjective
• sinner noun
• sinningly adverb
• sinningness noun
• unsinning adjective

Etymology

Origin of sin¹

First recorded before 900; Middle English noun sinne, sin(e), sen(ne), Old English syn(n) “moral or religious offense, misdeed”; akin to German Sünde, Old Norse synd, Latin sōns (inflectional stem sont- ) “guilty,” literally “that man being the one”; the verb is derivative of the noun; the Germanic and Latin forms all being present participle forms of the root es- “to be”; am ( def. )

Origin of sin²

First recorded in 1895–1900; from Hebrew śīn

Origin of sīn⁴

From Arabic

Example Sentences

That would be considered a mortal sin by the vast majority of football fandom.

From BBC • Mar. 29, 2026

They focused on people who had leprosy, a disease historically linked with stigma and ideas of sin, as well as tuberculosis.

From Science Daily • Mar. 13, 2026

His appointment also goes against a long-held notion in the Islamic Republic that hereditary rule is a sin practiced by un-Islamic monarchies.

From The Wall Street Journal • Mar. 9, 2026

He has written an entire book criticizing “the sin of empathy.”

From Slate • Jan. 30, 2026

In White’s desperation to get Hale, he’d committed the ultimate sin of an evidence man and believed, despite apparent contradictions, what he wanted to believe.

From "Killers of the Flower Moon" by David Grann

Related Words

• crime
• error
• evil
• fault
• guilt
• immorality
• lust
• misdeed
• offense
• shortcoming
• transgression
• violation
• wrong
• wrongdoing