animal

noun
  1. A living organism that feeds on organic matter, typically having specialized sense organs and nervous system and able to respond rapidly to stimuli. noun
    The zoo houses a wide variety of animals from around the world.
    Humans are considered animals because they share many biological characteristics with other species.
  2. A mammal, as opposed to a bird, reptile, fish, or insect. noun
    Dogs and cats are common household animals.
    The farm had many animals, including cows and sheep.
  3. A person who behaves in a bestial or brutish manner. noun
    He was an animal on the football field, showing no mercy to his opponents.
    After the argument, he acted like an animal, shouting and throwing things.
  4. Pertaining to or characteristic of animals. adjective
    The animal instincts of survival and reproduction are strong in all species.
    She had an animal grace in her movements, fluid and natural.