The Collaborative International Dictionary of English v.0.48:
Evince \E*vince"\, v. t. [imp. & p. p. Evinced; p. pr. & vb.
n. Evincing.] [L. evincere vanquish completely, prevail,
succeed in proving; e out + vincere to vanquish. See
Victor, and cf. Evict.]
1. To conquer; to subdue. [Obs.]
Error by his own arms is best evinced. --Milton.
2. To show in a clear manner; to prove beyond any reasonable
doubt; to manifest; to make evident; to bring to light; to
Common sense and experience must and will evince the
truth of this. --South.