Of an animal: not having the power of reason. Now chiefly literary in rude beast (usually understood in other senses of the adjective).

Of or relating to animals, esp. mammals or quadrupeds (as contrasted with humans); animal or mammalian in kind or nature; characteristic of an…

Of or pertaining to the brutes, or lower animals, as opposed to man.

Of a particular breed or species of animal: having qualities or habits considered less admirable or desirable than those of other animals (or of…

Of a lower order of being than humans; belonging to or characteristic of the natural world excluding the human race.