Wordnet 3.0
ADJECTIVE (1)
1.
capable of being modified in form or character or strength (especially by making less extreme);
- Example: "the rhythm of physiological time is not modifiable except by interference with certain fundamental processes" - Alexis Carrel;
The Collaborative International Dictionary of English v.0.48:
Modifiable \Mod"i*fi`a*ble\, a. [From Modify.]
Capable of being modified; liable to modification.
[1913 Webster]
WordNet (r) 3.0 (2006):
modifiable
adj 1: capable of being modified in form or character or
strength (especially by making less extreme); "the rhythm
of physiological time is not modifiable except by
interference with certain fundamental processes" - Alexis
Carrel [ant: unmodifiable]