Flĕx'ion, n.

(flĕk'shun), n. [Lat. flexio, Fr. & Sp. flexion, It. flessione.]

1. The act of flexing or bending; a turning.
2. A bending; a part bent; a fold. Bacon.
3. (Gram.) Syntactical change of form of words; inflection.

Express the syntactical relations by flexion. W. Hamilton. 4. (Anat.) That motion of a joint which gives the distal member a continually decreasing angle with the axis of the proximate part.