Definition of "Addy"

Addy¹

proper noun
plural Addys or Addies
1. A diminutive of the female given names Adelaide, Adeline, Adrienne, or Addison, from the Germanic languages or French or transferred from the surname.
  Quotations
  My name is Addison Jane Dawson, but you can call me Addy; everyone else does.
  2009, J. Scott Romig, The Lookout Tree, Author House, page 1
2. A diminutive of the male given name Adam, from Hebrew.
  Quotations
  "Let be, Addy, let be. Ben will be joking. Why, he's i' the right to laugh at me--I canna help laughing at myself." "I shan't loose him till he promises to let the door alone," said Adam.
  1859, George Eliot [pseudonym; Mary Ann Evans], “Adam Bede/Chapter I”, in Adam Bede […], volumes (please specify |volume=I, II, or III), Edinburgh, London: William Blackwood and Sons
3. A surname originating as a patronymic, derived from the given name Adam.

Addy²

noun
countable and uncountable, plural Addies
1. Alternative form of Addie (“Adderall”).