(noun)
the variation of a word's form that are used to attribute or distinguish aspects such as gender, number, tense, or mood, usually made at the end of the word, or the process of making such changes to words;
e.g. The teacher taught the students about inflection in the language.
(noun)
the action of bending or curving something, or a bend of curve in something;
e.g. We could not see what was beyond the inflection in the road.
(noun)
a change in the direction of the curvature of a curve, either from concave to convex or vice versa, or a point at which such a change occurs, especially in the context of mathematical graphs;
e.g. This change is represented as an inflection on the graph.