Definition of "Addie"

Addie¹

proper noun
plural Addies
1. A diminutive of the female given names Adele, Adeline, Adelaide, or Addison.

Addie²

noun
countable and uncountable, plural Addies
1. (slang) Adderall, especially when used as a cognitive enhancer or recreational drug.
  Quotations
  “Just popped an Addie, so I’m good to go” — this sort of pretest attitude has become pervasive. Conversations with several students suggested Adderall was always available, costing from $2 to $5 a pill.
  2013 March 4, Roger Cohen, “The Competition Drug”, in The New York Times‎

Addie³

proper noun
plural Addies
1. A surname.