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  • sin
    sin
    noun
    transgression of divine law.
  • sīn
    sīn
    noun
    the 12th letter of the Arabic alphabet.
  • Sin
    Sin
    noun
    the Akkadian god of the moon: the counterpart of the Sumerian Nanna.
  • SIN
    SIN
    abbreviation
    social insurance number
Synonyms

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.


verb (used without object)

sins, present (3rd person singular) sinned, past participle, past sinning present participle
  1. to commit a sinful act.

    Synonyms:
    trespass, transgress
  2. to offend against a principle, standard, etc.

verb (used with object)

sins, present (3rd person singular) sinned, past participle, past sinning present participle
  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.


sin 3 American  

abbreviation

Trigonometry.
  1. sine.


sīn 4 American  
[seen] / sin /

noun

  1. the 12th letter of the Arabic alphabet.


Sin 5 American  
[seen] / sin /

noun

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


sin 1 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

"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

verb

  1. theol to commit a sin

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

"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
SIN 2 British  

abbreviation

  1. social insurance number

"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

sin 3 British  
/ siːn /

noun

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

"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

sin 4 British  
/ sɪn /

preposition

  1. a Scot dialect word for since

"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

sin 5 British  
/ saɪn /

abbreviation

  1. sine

"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

sin Scientific  
  1. Abbreviation of sine


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


Synonym Usage

See crime.

Other Word Forms

Derived Forms

Inflected Forms

Participles

Conjugated Forms

Present

Past

Future

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”; see origin at am ( def. )

Origin of sin2

First recorded in 1895–1900; from Hebrew śīn

Origin of sīn4

From Arabic

Explanation

You might not want to be the one at the party who takes the last piece of cake, but then again, it would be a sin to let it sit there, uneaten. A sin is a deeply regrettable action. The most common definition of sin is religious: it's an immoral act against God or divine law. Any serious offense, even if it's not religious, can be called a sin, and so can something less serious if you're talking about it in a joking way, as in, "You've got to buy those shoes — it would be an absolute sin not to." In math, sin is the abbreviation of sine, the trigonometric function.

Keep Reading on Vocabulary.com

Vocabulary lists containing sin

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

She had converted to Catholicism in the 1990s, telling The Times: "To have a church which calls a sin a sin and has done with it is a blessed relief."

From BBC Jul. 10, 2026

On a recent episode of What Next, Lizzie O’Leary spoke to Nagle about how America’s original sin is written into who we are today.

From Slate Jul. 3, 2026

To him it was a sin not to shear the sheep.

From MarketWatch Jul. 2, 2026

“Grantchester” may be ending, but “Father Brown” endures because its homilies champion the belief that good exists in everybody, even in the hearts of those who commit mortal sin.

From Salon Jun. 16, 2026

“I’m sayin’, though, it’s a sin to waste talent like you got.”

From "We Were Here" by Matt De La Peña

En er hǫfðingjar rœddu þetta milli sīn, sem nū er sagt, þā sā þeir, hvar sigldu þrjū skip all-mikil, ok fjōrða sīðast, ok var þat Ormrinn langi.

From Icelandic Primer with Grammar, Notes and Glossary by Sweet, Henry

Dō brāhte man die vrouwen     dā si in ligen vant. si huop sīn schœne houbet     mit ir vil wīȥen hant; dō kuste s’ alsō tōten     den edelen ritter guot.

From A Middle High German Primer Third Edition by Wright, Joseph

Sī koment underwīlen her die baȥ dā heime möhten sīn.

From A Middle High German Primer Third Edition by Wright, Joseph

The present participle with sīn is sometimes used as in English, see ‘Arme Heinrich,’ l. 24.

From A Middle High German Primer Third Edition by Wright, Joseph

Sigvaldi jarl lēt skotta við sīn skip, ok lagði ekki til orrostu.

From Icelandic Primer with Grammar, Notes and Glossary by Sweet, Henry

Thousands who flew into Sin City on the insurer’s dime were treated to a Pink concert, a Jimmy Fallon-led singalong and selfies with the “Jake from State Farm” actor.

From The Wall Street Journal Jun. 17, 2026

But analysts are growing more confident in a Las Vegas comeback, and MGM also isn’t as dependent on Sin City as some competitors.

From Barron's Jun. 1, 2026

But head coach Sergej Jakirovic will be sitting out the Sin City jaunt as he takes a more peaceful breather before the bright lights of the Premier League beckon.

From BBC May 23, 2026

These include the Sin Nombre virus in the Western U.S. and the Andes virus in Argentina and Chile.

From MarketWatch May 8, 2026

The second night he preached, his topic was The Wages of Sin.

From "Go Set a Watchman: A Novel" by Harper Lee

Pura Casilla, the governor of San Cristobal province, told Noticias SIN that the explosion occurred in a commercial area and greatly affected businesses near the town center.

From Seattle Times Aug. 15, 2023

The description for the folder Correspondence SIN reads:

From The Guardian Mar. 23, 2017

These may be labeled, for example, SIN , ARCSIN, or ASIN.

From Textbooks Feb. 13, 2015

Having SIN coordinate her workout schedule “keeps me on the straight and narrow!” she exclaimed.

From New York Times Dec. 17, 2014

SIN, sorrow and death have not been invented by Christian priests.

From Five Sermons by Whipple, H. B.

Now as a bishop, with a Church commitment to tangibly repent for its past sins, she felt the institution was starting to better represent the Church her mother and many others had stayed loyal to.

From BBC Jun. 18, 2026

But as sins go, this one was tough for two diehard British mystery fans to resist.

From Salon Jun. 16, 2026

The sentiment is unobjectionable, though the act of apologizing is made infinitely easier when the sins belong to unnamed others in centuries past.

From The Wall Street Journal May 27, 2026

Those are the three deadly sins of trading.

From MarketWatch May 26, 2026

I’ve always been the clown and mischief maker of the family; I’ve always had to pay double for my sins: once with scoldings and then again with my own sense of despair.

From "The Diary of a Young Girl" by Anne Frank

After listing all those for whom she writes — “for the sinned against and the sanctifying” — Perry called for unity in difficult times:

From Los Angeles Times Nov. 17, 2022

He left the church shortly thereafter, after confessing to the congregation as a whole that he had sinned in such a way that it would necessitate him stepping down from ministry.

From Salon Jun. 28, 2022

“I have sinned, I’ve broken the law and I have no excuses,” Kreuper said via teleconference.

From Seattle Times Feb. 7, 2022

In 2018, the board, which has a tarnished recent history, reciprocated his antagonism, censuring him for having sinned against collegiality by things he had said and done.

From Washington Post Oct. 27, 2021

Yes, he had sinned: one morning, alone, in the dirty bathroom, in the square, dirt-gray cupboard room that was filled with the stink of his father.

From "Go Tell It on the Mountain" by James Baldwin

Crusaders came to expect standard privileges like the indulgence, a means to reduce the penance owed for sinning by giving money directly to the church or paying for masses or other clerical services.

From Textbooks Apr. 19, 2023

He insists he is a man more sinned against than sinning and is working with lawyers to clear his name.

From BBC Jul. 13, 2021

I’ve been oppressed by all these facts and evidence that dinned against My simple claim that I am not more sinning than I’m sinned against.

From Washington Post Jul. 7, 2021

And as he tells The Envelope, he’s not interested in examining or lingering on his past roles, but he does have a lot to say about religion, taking things seriously, and sinning with bread.

From Los Angeles Times Jan. 30, 2020

The man laughed and said, “A preacher what owns up to sinning, huh? Ain’t heard of no such man in these parts. Naw, that would’ve stuck with me.”

From "Elijah of Buxton" by Christopher Paul Curtis

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