animal

noun:a living organism that feeds on organic matter, typically having specialized sense organs and nervous system and able to respond rapidly to stimuli
- The lion is a majestic animal that rules the savanna.
noun:a mammal, as opposed to a bird, reptile, fish, or insect
- We saw many birds at the sanctuary, but the only other animal we spotted was a raccoon.
noun:a person without civilized or refined qualities, behaving in a physical, instinctive, or uncivilized way
- After the fight, the coach called him an animal for his brutal behavior on the field.
adjective:relating to the physical or biological nature of living organisms, often as distinct from the spiritual or rational
- His animal instincts took over when he felt threatened.