Main entry: informal
Definition: not formal
Usage: conservative people unaccustomed to informal dress; an informal free-and-easy manner; an informal gathering of friends
Antonyms: formal
Definition: being in accord with established forms and conventions and requirements (as e.g. of formal dress)
Main entry: informal
Definition: used of spoken and written language
Antonyms: formal
Definition: (of spoken and written language) adhering to traditional standards of correctness and without casual, contracted, and colloquial forms
Antonyms: uncommon
Definition: not common or ordinarily encountered; unusually great in amount or remarkable in character or kind
Antonyms: individual, single
Definition: being or characteristic of a single thing or person
Main entry: cozy, informal, intimate
Definition: having or fostering a warm or friendly and informal atmosphere
Usage: had a cozy chat; a relaxed informal manner; an intimate cocktail lounge; the small room was cozy and intimate
Antonyms: hostile
Definition: troops belonging to the enemy's military forces
Antonyms: unfriendly
Definition: not disposed to friendship or friendliness
Antonyms: hostile
Definition: not belonging to your own country's forces or those of an ally
Antonyms: unfriendly
Definition: not easy to understand or use
Main entry: loose, informal
Definition: not officially recognized or controlled
Usage: an informal agreement; a loose organization of the local farmers
Antonyms: official
Definition: having official authority or sanction