B2[C]a small animal with a long, narrow, soft body without arms, legs, or bones: The kiwi eats worms, other invertebrates, and berries.Worms, snails, slugs and similar animals›[C]the young of particular types of insect: It's distressing enough to find a worm in your apple but finding half of one is worse.→ See alsowoodwormThe development and parts of insects›[C]a type of worm that lives in an animal's intestine, feeding on the food there, or on an animal's body, feeding off its blood: a parasitic wormThe vet says our dog has worms.→ See alsotapewormWorms, snails, slugs and similar animals›[S]informalan unpleasant person who does not deserve respect: Don't be such a worm, you don't have to lie to me.People of little importanceUnpleasant people in generalUnpleasant men