An operative person or thing.
Any of a class of behaviors that produce consequences by operating (i.e., acting) upon the environment.
That operates to produce an effect.
An intelligent, self-aware being.
Lifeform with the capability to feel sensation, such as pain.
Experiencing sensation, thought, or feeling.
Possessing human-like awareness and intelligence.
Able to consciously perceive through the use of sense faculties.