A person who performs or offers to perform a service voluntarily, Law A person who works without pay or assumes an obligation to which he or she is not a party or otherwise interested, One who enters into, or offers for, any service of his/her own free will, especially when done without pay, adjective_ Being, consisting of, or done by volunteers, Botany Growing from self-sown or accidentally dropped seed. Used of a cultivated plant or crop, without payment, verb_ tell voluntarily, do volunteer work, tell voluntarily, transitive verb_ To offer or bestow voluntarily, or without solicitation or compulsion, To do or offer to do something voluntarily, intransitive verb_ To give or offer to give voluntarily, To perform or offer to perform a service of one's own free will, To do charitable or helpful work without pay