What is the meaning of Inflection?

A change in the form of a word (morphologic change) to express different grammatical categories.

An instance of such change.

An affix representing such an instance.

Any form produced by such an instance of a change, such as the principal parts for any given stem: any of the declined or conjugated forms that constitute its declension or conjugation.

A change in pitch or tone of voice.

A change in curvature from concave to convex or from convex to concave.

A turning away from a straight course.

Diffraction.

Source: wiktionary.org