'De rigueur' definitions:
Definition of 'de rigueur'
(from WordNet)
adjective
Required by etiquette or usage or fashion; "instruction as to when and where a silk hat is de rigueur"
Definition of 'De rigueur'
From: GCIDE
- De rigueur \De ri`gueur"\ [F. See 2d Rigor.] According to strictness (of etiquette, rule, or the like); obligatory; strictly required. [Webster 1913 Suppl.]
Synonyms of 'de rigueur'
From: Moby Thesaurus
- accepted,
- acknowledged,
- admitted,
- approved,
- au fait,
- becoming,
- being done,
- binding,
- comme il faut,
- conformable,
- conventional,
- correct,
- customary,
- decent,
- decorous,
- done,
- formal,
- imperative,
- imperious,
- mandatory,
- meet,
- must,
- necessary,
- nice,
- obligatory,
- orthodox,
- peremptory,
- proper,
- received,
- recognized,
- required,
- right,
- seemly,
- traditional