Flex"ion (?), n. [L. flexio: cf. F. flexion.]
The act of flexing or bending; a turning.
A bending; a part bent; a fold.
Syntactical change of form of words, as by declension or conjugation; inflection.
Express the syntactical relations by flexion.
Sir W. Hamilton.
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.
© Webster 1913.