Wordnet 3.0
ADJECTIVE (1)
1.
susceptible of improvement;
The Collaborative International Dictionary of English v.0.48:
Improvable \Im*prov"a*ble\, a. [From Improve.]
1. Capable of being improved; susceptible of improvement;
admitting of being made better; capable of cultivation, or
of being advanced in good qualities.
[1913 Webster]
Man is accommodated with moral principles,
improvable by the exercise of his faculties. --Sir
M. Hale.
[1913 Webster]
I have a fine spread of improvable lands. --Addison.
[1913 Webster]
2. Capable of being used to advantage; profitable;
serviceable; advantageous.
[1913 Webster]
The essays of weaker heads afford improvable hints
to better. --Sir T.
Browne.
-- Im*pro"a*ble*ness, n. -- Im*prov"a*bly, adv.
[1913 Webster]
WordNet (r) 3.0 (2006):
improvable
adj 1: susceptible of improvement
Moby Thesaurus II by Grady Ward, 1.0:
21 Moby Thesaurus words for "improvable":
ameliorable, amendable, correctable, corrigible, curable,
emendable, fixable, medicable, mendable, perfectible, reclaimable,
recoverable, rectifiable, recyclable, redeemable, remediable,
repairable, reparable, restorable, retrievable, reversible