definition of
flexion

[1] #1 flexion n. [flexure, flection] the state of being flexed (as of a joint). wn

[2] #2 flexion n. [inflection, flection] deviation from a straight or normal course. wn

[3] #3 flexion n. [flexure] act of bending a joint; especially a joint between the bones of a limb so that the angle between them is decreased. wn