opt-in

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opt-in

/ˈɒptˌɪn/ UK
/ˈɑptˌɪn/ Atlantic Canada, US
/ˈɑpˌtɪn/ Atlantic Canada, US
/ˈɔptˌɪn/ Australia
[ˈɔ̟ptˌən] New Zealand

Rhymes with -ɒpt

Where it comes from

From opt + in.

adjective

not comparable The property of having to choose explicitly to join or permit something; a decision having the default option being exclusion or avoidance; used particularly with regard to mailing lists and advertising. They set up an opt-in mailing list, so that those who wanted the notices could subscribe.

Opposite: opt-out

Thesaurus

adjective

Opposite: opt-out

Translations

Every language

adj 1. The property of having to choose explicitly to join or permit something

Español	de adhesión
Deutsch	unter vorhergehender Einwilligung, vorhergehende Einwilligung erfordernd

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Cite this

MLA

"opt-in." Wiktionary, via Micwyn, micwyn.com/word/opt-in. Accessed 6 Nov. 2026.

APA

opt-in. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/opt-in

Chicago

"opt-in." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/opt-in.

BibTeX

@misc{opt_in_2026,
  title = {opt-in},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/opt-in},
  urldate = {2026-11-06}
}