neuropteranPronunciation: /njʊˈrɒpt(ə)rən, njʊəˈrɒpt(ə)rən/ EntomologyDefinition of neuropteran noun a predatory flying insect of the order Neuroptera, such as a lacewing or alderfly. adjective relating to or denoting neuropterans. Derivatives neuropterous adjective neuropteran in other Oxford dictionaries Definition of neuropteran in the US English dictionary