1. (n.) The act of flexing or bending; a turning.

2. (n.) A bending; a part bent; a fold.

3. (n.) Syntactical change of form of words, as by declension or conjugation; inflection.

4. (n.) The bending of a limb or joint; that motion of a joint which gives the distal member a continually decreasing angle with the axis of the proximal part; -- distinguished from extension.