Given to extravagant expenditure; expending money or other property without necessity; profuse; lavish; wasteful: said of persons: as, a prodigal man; the prodigal son.Profuse; lavish; wasteful: said of things: as, a prodigal expenditure of money.Very liberal; lavishly bountiful: as, nature is prodigal of her gifts.Proud.n. One who expends money extravagantly or without necessity; one who is profuse or lavish; a waster; a spendthrift.n. In civil law. a person of full age for whom, by judicial authority, a curator is appointed, by reason of his inability to attend to his obligations and estate.