'Contestable' definitions:

Definition of 'contestable'

(from WordNet)
adjective
Capable of being contested [ant: incontestable, incontestible]

Definition of 'Contestable'

From: GCIDE
  • Contestable \Con*test"a*ble\, a. [Cf. F. contestable.] Capable of being contested; debatable. [1913 Webster]