inflection

Short definition from Wiktionary

Noun

1. 1
   The linguistic phenomenon of morphological variation, whereby terms take a number of distinct forms in order to express different grammatical features.
2. 2
   The linguistic phenomenon of morphological variation, whereby terms take a number of distinct forms in order to express different grammatical features: Any specific type of morphological variation, which applies to a given class of terms.
3. 3
   The linguistic phenomenon of morphological variation, whereby terms take a number of distinct forms in order to express different grammatical features: An affix representing a given variation.
4. 4
   The linguistic phenomenon of morphological variation, whereby terms take a number of distinct forms in order to express different grammatical features: Any specific morphological form of a particular term, such as the principal parts for any given stem; any of the declined or conjugated forms that constitute its declension or conjugation.
5. 5
   A change in pitch or tone of voice.
6. 6
   A change in curvature from concave to convex or from convex to concave.
7. 7
   A turning away from a straight course.
8. 8
   Diffraction.