noun

1. In scientific usage, a multicellular organism that is usually mobile, whose cells are not encased in a rigid cell wall (distinguishing it from plants and fungi) and which derives energy solely from the consumption of other organisms (distinguishing it from plants).

   “A cat is an animal, not a plant. Humans are also animals, under the scientific definition, as we are not plants.”

2. In non-scientific usage, any member of the kingdom Animalia other than a human.

3. In non-scientific usage, any land-living vertebrate (i.e. not fishes, insects, etc.).

Synonyms: beast, beast, creature, brute, monster, savage