We found 4 dictionaries that include the word half birthday:

General dictionaries General (3 matching dictionaries)

  1. half-birthday, half birthday: Wiktionary [home, info]
  2. half-birthday: Dictionary.com [home, info]
  3. Half-birthday, Half birthday: Wikipedia, the Free Encyclopedia [home, info]

Slang dictionariesSlang

(1 matching dictionary)

  1. Half birthday: Urban Dictionary [home, info]