omnivorousPronunciation: /ɒmˈnɪv(ə)rəs/Translate omnivorous | into Spanish Definition of omnivorous adjective 1(of an animal or person) feeding on a variety of food of both plant and animal origin. 2indiscriminate in taking in or using whatever is available:an omnivorous readerDerivatives omnivorously adverb omnivorousness noun Origin: mid 17th century: from Latin omnivorus + -ousomnivorous in other Oxford dictionaries Definition of omnivorous in the US English dictionary