1. a person who donates something, especially money to a fund or charity: "an anonymous donor has given $25"
▪ a person who provides blood for transfusion, semen for insemination, or an organ or tissue for transplantation: "one third of patients die before a suitable donor is found"
▪ an atom or molecule that provides electrons in forming a coordinate bond.
▪ an impurity atom in a semiconductor which contributes a conducting electron to the material.
Word OriginMiddle English: from Old French doneur, from Latin donator, from donare ‘give’.