volunteer

A person who performs or offers to perform a service voluntarily.

A person who chooses to enter a branch of the military without being drafted or forced to do so by law.

A person who works without pay or assumes an obligation to which he or she is not a party or otherwise interested.

A cultivated plant growing from self-sown or accidentally dropped seed.

Being, consisting of, or done by volunteers.

Growing from self-sown or accidentally dropped seed. Used of a cultivated plant or crop.

To give or offer to give voluntarily.

To compel (someone) to do something.

To perform or offer to perform a service of one’s own free will.

To choose to enter military service of one’s own free will.