Of action, etc.: self-generated, spontaneous; (of a thing) self-acting; having the power of motion within itself. In later use (Physiology): having…

That moves or is capable of moving by inherent power or energy rather than by the action of external forces; that moves automatically. Also in…

Having self-generated motion or energy.

That moves or is capable of moving by inherent power or energy rather than by the action of external forces. Also in philosophical contexts: that…

Of motion: Arising purely from, entirely determined by, the internal operative or directive forces of the organism.

That moves or is capable of moving by inherent power or energy rather than by the action of external forces; (also) that facilitates self-motion.

That moves or is capable of moving by inherent power or energy rather than by the action of external forces. Also of the soul: capable of…

Producing voluntary movement; self-moving; automatic.