Entry 1 sense Webster, 1913 Insectivorous /ĭnˌ-sĕk-tĭv'-ẽr-əs/ · In·sec·tiv·o·rous · IPA /ˌɪnsɛkˈtɪv(ə)ɹəs/ 01 a. Feeding or subsisting on insects; carnivorous. 1. Feeding or subsisting on insects; carnivorous.