The Collaborative International Dictionary of English v.0.48:

Spelling \Spell"ing\, a.
   Of or pertaining to spelling.
   [1913 Webster]

   Spelling bee, a spelling match. [U.S.]

   Spelling book, a book with exercises for teaching children
      to spell; a speller.

   Spelling match, a contest of skill in spelling words,
      between two or more persons.
      [1913 Webster]

WordNet (r) 3.0 (2006):

spelling bee
    n 1: a contest in which you are eliminated if you fail to spell
         a word correctly [syn: spelling bee, spelldown,
         spelling contest]