a. rare. [f. WILL v.1 or 2 + -ABLE.] † a. That is to be willed or desired. Obs.
14[?]. Cloude of Onknowing, MS. Univ. Coll. 14. a 3 b. Þe hyȝest wyllabyll þing [L. vellibile], þe whych is god.
b. Capable of being willed.
1880. Caird, Introd. Philos. Relig., ix. 292. All truth is knowable as my knowledge, all good willable as my will.