Transformation

The act of transforming or the state of being transformed.

A marked change in appearance or character, especially one for the better.

The replacement of the variables in an algebraic expression by their values in terms of another set of variables; a mapping of one space onto another or onto itself; a function that changes the position or direction of the axes of a coordinate system.

A rule that systematically converts one syntactic form into another; a sentence derived by such a rule.