arbiter elegantiae
noun
ar·bi·ter el·e·gan·ti·ae
| \ ˈär-bə-tər-ˌe-lə-ˈgan-shē-ˌē\
variants:
or arbiter elegantiarum \ ˈär-bə-tər-ˌe-lə-ˌgan-shē-ˈa-rəm 
, -ˈer-əm \
, -ˈer-əm \
Definition of arbiter elegantiae
: a person who prescribes, rules on, or is a recognized authority on matters of social behavior and taste
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