noun

1. a person who chooses freely to do or offer to do something
2. a person who chooses freely to enter naval or military service, without being compelled to do so by law
3. Bot. a volunteer plant
4. Law
   1. a person who chooses freely to enter into any transaction with no promise of compensation
   2. a person to whom property is transferred without valuable consideration

Etymology: earlier voluntier < obs. Fr voluntaire < L (miles)voluntarius, voluntary (soldier)

adjective

1. composed of volunteers, as an army
2. serving as a volunteer, usually without compensation
3. of a volunteer or volunteers
4. Bot. growing from seed that has fallen naturally to the ground, not planted by a person

transitive verb

intransitive verb