- 1a person or an organization that makes a gift of money, clothes, food, etc. to a charity, etc. international aid donors (= countries which give money, etc. to help other countries) She is one of the charity's main donors.
- 2a person who gives blood or a part of his or her body to be used by doctors in medical treatment a blood donor The heart transplant will take place as soon as a suitable donor can be found. donor organs a donor card (= a card that you carry giving permission for doctors to use parts of your body after your death)