<p><strong>Noun</strong></p><ul><li>a person who gives or donates.</li><li>Synonyms: patron, sponsor, contributor, supporter.</li><li>Medicine/Medical: a person or animal providing blood, an organ, bone marrow cells, or other biological tissue for transfusion or transplantation: sperm donor, organ donor.</li><li>Law: a person who gives property by gift, legacy, or devise, or who confers a power of appointment.</li></ul><p><strong>Adjective</strong></p><ul><li>of or relating to the biological tissue of a donor: donor organ.</li></ul>