a. [ L. mutabilis, fr. mutare to change. See Move. ] 1. Capable of alteration; subject to change; changeable in form, qualities, or nature. [ 1913 Webster ]
Things of the most accidental and mutable nature. South. [ 1913 Webster ]
(adj) capable of or tending to change in form or quality or nature, Syn. changeable, Ant. immutable, Example:a mutable substance; the mutable ways of fortune; mutable weather patterns; a mutable foreign policy