What is "modifiable"

Modifiable \Mod"i*fi`a*ble\, a. [From Modify.] Capable of being modified; liable to modification.

a. capable of being modified; subject to modification.

adj. 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]