(slang) A donation.

plural of dono

One who makes a donation. / (chemistry) A group or molecule that donates either a radical, electrons or a moiety in a chemical reaction. Compare acceptor.

plural of donor

(medical slang, derogatory) A motorcycle ridden by someone who is likely to die due to either recklessness or the inherent risk of riding a motorcycle.

(medicine) A person with blood type O, which lacks antigens and is therefore compatible with all other blood types, allowing them to donate blood to any other person.

plural of universal donor

A surname from Irish. / A male given name transferred from the surname. / The Scottish singer-songwriter Donovan. / An unincorporated community in Johnson County, Georgia, United States.

(slang, archaic) A potato.

A person (living or dead) from whom an organ is removed in order to be transplanted into another person. / (chiefly US, slang) A motorcyclist, especially one who does not wear a protective helmet.