donor

/ˈdoʊnər/
noun
  1. A person or organization that gives something, especially money or goods, to help a cause or charity.
    • Many donors contributed to the disaster relief fund after the earthquake.
    • The anonymous donor gave $10,000 to the local library.
    • The museum received a valuable painting from a private donor.
  2. A person who gives blood, an organ, or tissue for medical use.
    • She became a bone marrow donor to help her cousin.
    • Blood donors save thousands of lives every year.
    • The hospital is urgently looking for kidney donors.
Antonyms