gracile Syllabification: (grac·ile)Pronunciation: /ˈgrasəl, ˈgrasˌīl/Definition of gracile adjective Anthropology (of a hominid species) of slender build. (of a person) slender or thin, especially in a charming or attractive way. Origin: early 17th century: from Latin gracilis 'slender'gracile in other Oxford dictionaries Definition of gracile in the British & World English dictionary