Definition from Wiktionary, the free dictionary
- Capable of being improved; susceptible of improvement; admitting of being made better; capable of cultivation, or of being advanced in good qualities.
- Capable of being used to advantage; profitable; serviceable; advantageous.
improvable (not comparable)
- Impossible to prove.
- improvable in The Century Dictionary, The Century Co., New York, 1911
- improvable in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913