opt-in

Fetched 2026-10-26 (cache).

Synonyms: opt, apt, out, oft, ope, op, opp, ept, oot, ops, ort

Antonyms: opt, apt, out, oft, ope, op, opp, ept, oot, ops, ort

Related words from Datamuse; suggestions, not definitions.

Adjective

1. 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.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.