Meaning of INFORMAL in English

INFORMAL

adjective

1.

conducted or carried out without rigidly prescribed procedure

carried on an informal investigation

Synonyms: irregular, unceremonious, unofficial

Related Word: casual, spontaneous; unauthorized; unconventional; private, special

Contrasted words: authorized, ceremonious, conventional, official, regular

Antonyms: formal

2.

Synonyms: easygoing 3, breezy, casual, ||common, dégagé, low-pressure, relaxed, ||sonsy, unconstrained, unfussy

Related Word: familiar, natural, simple

Contrasted words: affected, mannered, prim, rigid, stiff, stilted

Antonyms: formal

Merriam Webster. Collegiate thesaurus English vocabulary.      Английский энциклопедический словарь тезаурус.