'Contributor' definitions:

Definition of 'contributor'

(from WordNet)
noun
Someone who contributes (or promises to contribute) a sum of money [syn: subscriber, contributor]
noun
A writer whose work is published in a newspaper or magazine or as part of a book

Definition of 'Contributor'

From: GCIDE
  • Contributor \Con*trib"u*tor\, n. One who, or that which, contributes; specifically, one who writes articles for a newspaper, magazine, or book. [1913 Webster]