ˈdəunə n. 1 a
person who gives or donates
something (e.g. to a charity). 2
one who provides
blood for a transfusion,
semen for insemination, or an
organ or
tissue for transplantation. 3 Chem. an
atom or
molecule that provides a
pair of electrons in forming a
coordinate bond. 4
Physics an
impurity atom in a
semiconductor which contributes a conducting
electron to
the material. ødonor card an
official card authorizing
use of organs for
transplant, carried by the donor. [ME f. AF donour, OF doneur f. L donator -oris f. donare give]