verb (used with object),changed,chang·ing.to make the form, nature, content, future course, etc., of (something) different from what it is or from what it would be if left alone:to transform or convert (usually followed by into).

verb (used without object),changed,chang·ing.to become different：to become altered or modified.

noun the act or fact of changing; fact of being changed: a transformation or modification; alteration.