noun: A diminutive of the female given names Adelaide, Adeline, Adrienne, or Addison, from the Germanic languages or French or transferred from the surname.
noun: A diminutive of the male given name Adam, from Hebrew.
noun: A surname originating as a patronymic, derived from the given name Adam.
noun: Alternative form of Addie (“Adderall”). [A diminutive of the female given names Adele, Adeline, Adelaide, or Addison.]