(1):
(n.) The act of flexing or bending; a turning.
(2):
(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.
(3):
(n.) Syntactical change of form of words, as by declension or conjugation; inflection.
(4):
(n.) A bending; a part bent; a fold.