1. noun /ˈænəməl/
a) 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. adjective /ˈænəməl/
a) Of or relating to animals.
animal instincts
b) Raw, base, unhindered by social codes.
animal passions
Wikipedia foundation.