adj one who enters into, or offers for, any service of his own free will.
2. volunteer ·vt to offer or bestow voluntarily, or without solicitation or compulsion; as, to volunteer one's services.
3. volunteer ·adj of or pertaining to a volunteer or volunteers; consisting of volunteers; voluntary; as, volunteer companies; volunteer advice.
4. volunteer ·vi to enter into, or offer for, any service of one's own free will, without solicitation or compulsion; as, he volunteered in that undertaking.
5. volunteer ·adj a grantee in a voluntary conveyance; one to whom a conveyance is made without valuable consideration; a party, other than a wife or child of the grantor, to whom, or for whose benefit, a voluntary conveyance is made.
6. volunteer ·adj one who enters into service voluntarily, but who, when in service, is subject to discipline and regulations like other soldiers;
opposed to conscript; specifically, a voluntary member of the organized militia of a country as distinguished from the standing army.