Antonyms for informal

Antonyms of adj informal

4 senses of informal

Sense 1:

informal (vs. formal)

formal (vs. informal)
ceremonialceremonious, conventionaldress, full-dressform-only(prenominal)full-dress, dressnominal, titularpositive, prescribedpro forma, perfunctorysemiformal, semi-formal, black-tiestarchy, stiff, buckramwhite-tie

Sense 2:

informal, loose

INDIRECT (VIA unofficial) -> official

Sense 3:

informal (vs. formal)

formal (vs. informal)
literary

Sense 4:

cozy, intimate, informal

INDIRECT (VIA friendly) -> unfriendly