1. a person who freely offers to take part in an enterprise or undertake a task.
▪ a person who works for an organization without being paid.
▪ a person who freely enrolls for military service rather than being conscripted, especially a member of a force formed by voluntary enrollment and distinct from the regular army.
▪ a plant that has not been deliberately planted.
▪ a person to whom a voluntary conveyance or deposition is made.
verb
1. freely offer to do something: "he volunteered for the job"
▪ say or suggest something without being asked: "it never paid to volunteer information"
▪ work for an organization without being paid.Similaroffer one's servicespresent oneselfstep forwardcome forwardmake oneself availableOppositebe conscripted
▪ commit (someone) to a particular undertaking, typically without consulting them:"he was volunteered for parachute training by friends"
Word Originlate 16th century (as a noun, with military reference): from French volontaire ‘voluntary’. The change in the ending was due to association with -eer.