n. 1. 1 the possibility of being achieved or accomplished; -- a property which may be possessed by a contemplated act. Syn. -- attainability, attainableness [ WordNet 1.5 ]
a. Capable of being achieved. Barrow. [ 1913 Webster ]
n. [ Cf. OF. achevance. ] Achievement. [ Obs. ] Sir T. Elyot. [ 1913 Webster ]