One entry found for informal.

Entry Word: informal
Function: adjective
Text: 1 not rigidly following established form, custom, or rules <an informal meeting allowed everyone to get acquainted>
Synonyms irregular, unceremonious, unconventional, unorthodox
Related Words unauthorized, unofficial; casual, easygoing, lax, loose, relaxed
Near Antonyms correct, decorous, proper; constrained, inhibited, restrained, rigid, stiff, stuffy, uptight
Antonyms ceremonial, ceremonious, conventional, formal, orthodox, regular, routine
2 not designed for special occasions <chose an informal flowery dress> -- see CASUAL 1
3 used in or suitable for speech and not formal writing <please don't use informal language in a serious essay> -- see COLLOQUIAL 1