I. ˈmyüd.əbəl, -ütəb- adjective
Etymology: Latin mutabilis, from mutare to change + -abilis -able — more at miss
1. : prone or liable to change : inconstant , fickle
a mutable mind
a mutable foreign policy
2.
a. : capable of change or of being changed in form, quality, or nature
a mutable substance
b. : subject to or capable of mutation : liable to mutate
mutable vowels
• mu·ta·ble·ness noun -es
II. noun
( -s )
: a mutable sound or grammatical form