- a person who gives or donates.
- a person or animal providing blood, an organ, bone marrow cells, or other biological tissue for transfusion or transplantation: sperm donor; organ donor.
- a person who gives property by gift, legacy, or devise, or who confers a power of appointment.
- of or relating to the biological tissue of a donor: donor organ.
- a person who makes a donation
- any person who voluntarily gives blood, skin, a kidney etc, for use in the treatment of another person
- law
- a person who makes a gift of property
- a person who bestows upon another a power of appointment over property
- the atom supplying both electrons in a coordinate bond
- an impurity, such as antimony or arsenic, that is added to a semiconductor material in order to increase its n-type conductivity by contributing free electrons
