Sprain (?), v. t. [imp. & p. p. Sprained (?); p. pr. & vb. n. Spraining.] [OF. espreindreto press, to force out, F. 'epreindre, fr. L. exprimere. See Express, v. t., and cf. Spraints.]
To weaken, as a joint, ligament, or muscle, by sudden and excessive exertion, as by wrenching; to overstrain, or stretch injuriously, but without luxation; as, to sprain one's ankle.
© Webster 1913.
Sprain, n.
The act or result of spraining; lameness caused by spraining; as, a bad sprain of the wrist.
Sprain fracture Med., the separation of a tendon from its point of insertion, with the detachment of a shell of bone to which the tendon is attached.
© Webster 1913.