| Main Entry: | de rigueur |
| Part of Speech: | adjective |
| Definition: | socially obligatory |
Synonyms: |
a must, au fait, called for, comme il faut, conforming to accepted standards, conventional, correct, mandatory, necessary, obligatory, proper, required, right |
| Main Entry: | compulsory |
| Part of Speech: | adjective |
| Definition: | binding |
Synonyms: |
compulsatory, de rigueur, forced, imperative, imperious, mandatory, necessary, obligatory, required, requisite |
Antonyms: |
free, liberalized, liberated, optional, unstipulated, voluntary |
| Main Entry: | decorous |
| Part of Speech: | adjective |
| Definition: | appropriate, suitable |
Synonyms: |
au fait, becoming, befitting, ceremonial, ceremonious, civilized, comely, comme il faut, conforming, conventional, correct, de rigueur, decent, demure, dignified, done, elegant, fit, fitting, formal, good, mannerly, meet, moral, nice, polite, prim, proper, punctilious, refined, respectable, right, seasonable, sedate, seemly, staid, well-behaved |
Antonyms: |
impolite, inappropriate, indecent, indecorous, unbecoming, unfit, unrefined, unseemly, unsuitable |
| Main Entry: | mandatory |
| Part of Speech: | adjective |
| Definition: | required, necessary |
Synonyms: |
binding, commanding, compelling, compulsatory, compulsory, de rigueur, essential, forced, imperative, imperious, indispensable, involuntary, irremissible, needful, obligatory, requisite |
Antonyms: |
optional, unnecessary, voluntary |
| Main Entry: | necessary |
| Part of Speech: | adjective |
| Definition: | essential |
Synonyms: |
all-important, basic, binding, bottom-line, cardinal, chief, compelling, compulsory, crucial, de rigueur, decisive, elementary, exigent, expedient, fundamental, imperative, incumbent on, indispensable, mandatory, momentous, name of game, needed, needful, obligatory, paramount, prerequisite, pressing, prime, principal, quintessential, required, requisite, significant, specified, unavoidable, urgent, vital, wanted |
Antonyms: |
inessential, unimportant, unnecessary, useless |
| Main Entry: | obligatory |
| Part of Speech: | adjective |
| Definition: | essential, required |
Synonyms: |
binding, coercive, compulsatory, compulsory, de rigueur, enforced, imperative, imperious, mandatory, necessary, requisite, unavoidable |
Antonyms: |
nonessential, optional, unrequired, voluntary |
| Main Entry: | proper |
| Part of Speech: | adjective |
| Definition: | mannerly, decent |
Synonyms: |
becoming, befitting, by the book, by the numbers, comely, comme il faut, conforming, correct, de rigueur, decorous, demure, genteel, in line, kosher*, moral, nice, polite, precise, priggish, prim, prissy, prudish, punctilious, puritanical, refined, respectable, right, seemly, solid, square*, stone, straight*, strait-laced, stuffy |
Antonyms: |
crass, crude, misbehaving, objectionable |
| Main Entry: | comme il faut |
| Part of Speech: | adjective |
| Definition: | proper |
Synonyms: |
becoming, befitting, comely, correct, de rigueur, decorous, fitting, polite, respectable, seemly |