'Quitter' definitions:

Definition of 'quitter'

From: WordNet
noun
A person who gives up too easily

Definition of 'Quitter'

From: GCIDE
  • Quitter \Quit"ter\ (kw[i^]t"t[~e]r), n.
  • 1. One who quits. [1913 Webster]
  • 2. A deliverer. [Obs.] --Ainsworth. [1913 Webster]