bisexual Syllabification: (bi·sex·u·al)Pronunciation: /bīˈsekSHo͞oəl/Translate bisexual | into French | into German | into Italian | into Spanish Definition of bisexual adjective sexually attracted to both men and women. Biology having characteristics of both sexes. noun a person who is sexually attracted to both men and women. Derivatives bisexualityPronunciation: /ˌbīsekSHo͞oˈalitē/ noun bisexual in other Oxford dictionaries Definition of bisexual in the British & World English dictionary