adjective (of an animal) feeding on both plants and animals. (of a person) eating all kinds of food, or having a wide range of interests and consuming anything available. Break it down: "Omni" means "all" (like in "omnipotent" or "omniscient"). "Vorous" comes from Latin "vorare," meaning "to devour," similar to the word "voracious." So, an omnivorous creature eats all kinds of food, devouring whatever it can.