Adjective

(en adjective)

Done, given, or acting of one's own free will.

* N. W. Taylor

That sin or guilt pertains exclusively to voluntary action is the true principle of orthodoxy.

* Alexander Pope

She fell to lust a voluntary prey.

Done by design or intention; intentional.

If a man accidentally kills another by lopping a tree, it is not voluntary manslaughter.

Working or done without payment.

Endowed with the power of willing.

* Hooker

God did not work as a necessary, but a voluntary , agent, intending beforehand, and decreeing with himself, that which did outwardly proceed from him.

Of or relating to voluntaryism.

a voluntary church, in distinction from an established or state church

Adjective

(en adjective)

Alert, awake.

Aware.

* , chapter=5

, title= The Mirror and the Lamp , passage=Here, in the transept and choir, where the service was being held, one was conscious every moment of an increasing brightness; colours glowing vividly beneath the circular chandeliers, and the rows of small lights on the choristers' desks flashed and sparkled in front of the boys' faces, deep linen collars, and red neckbands.}}

*

Once again the animals were conscious of a vague uneasiness.

Aware of one's own existence; aware of one's own awareness.

* 1999 , Eckhart Tolle, The Power of Now , Hodder and Stoughton, pages 61–62:

The best indicator of your level of consciousness is how you deal with life's challenges when they come.  Through those challenges, an already unconscious person tends to become more deeply unconscious, and a conscious' person more intensely ' conscious .