informal.
Not formal or ceremonious.
Meaning & usage
Not formal or ceremonious.
an informal get-together
Not in accord with the usual regulations.
an informal agreement
Suited for everyday use.
informal clothes
Reflecting everyday, non-ceremonious usage.
Not organized; not structured or planned.
Where this word comes from
Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in-bor. Middle English in- English in- English formal English informal From in- + formal.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.