arbiter elegantiarum
noun
arbiter el·e·gan·ti·a·rum
| \ -ˌe-lə-ˌgan-shē-ˈa-rəm
, -ˈer-əm\
, -ˈer-əm\
Definition of arbiter elegantiarum
: a person who prescribes, rules on, or is a recognized authority on matters of social behavior and taste
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