hymenopteranPronunciation: /ˌhʌɪmɛˈnɒpt(ə)rən, ˌhʌɪmɪˈnɒpt(ə)rən/ EntomologyDefinition of hymenopteran noun an insect of the order Hymenoptera, such as a bee, wasp, or ant. adjective relating to or denoting hymenopterans. Derivatives hymenopterous adjective hymenopteran in other Oxford dictionaries Definition of hymenopteran in the US English dictionary