informal

1. Not formal (synset 301047939)
   "conservative people unaccustomed to informal dress"; "an informal free-and-easy manner"; "an informal gathering of friends"
   also: informal - used of spoken and written language
   tells us about: formality, formalness - a manner that strictly observes all forms and ceremonies
   similar to:

   • casual, daily, everyday - appropriate for ordinary or routine occasions
   • casual, free-and-easy - natural and unstudied
   • folksy - very informal and familiar
   • unceremonial, unceremonious - without ceremony or formality
2. Not officially recognized or controlled (synset 301638070)
   "an informal agreement"; "a loose organization of the local farmers"
   similar to: unofficial - not having official authority or sanction
   same as: loose
3. Used of spoken and written language (synset 301049410)
   also:

   • informal - not formal
   • unrhetorical - not rhetorical
   tells us about: formality, formalness - a manner that strictly observes all forms and ceremonies
   similar to:

   • colloquial, conversational - characteristic of informal spoken language or conversation
   • common, vernacular, vulgar - being or characteristic of or appropriate to everyday language
   • epistolary, epistolatory - written in the form of or carried on by letters or correspondence
   • slangy - constituting or expressed in slang or given to the use of slang
   • subliterary - not written as or intended to be literature
   • nonliterary, unliterary - marked by lack of affectation or pedantry
4. Having or fostering a warm or friendly and informal atmosphere (synset 301079833)
   "had a cozy chat"; "a relaxed informal manner"; "an intimate cocktail lounge"; "the small room was cozy and intimate"
   similar to: friendly - characteristic of or befitting a friend
   same as: cozy, intimate

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