Source : Webster's Revised Unabridged Dictionary (1913)

Countercheck \Coun`ter*check"\ (koun`t?r-ch?k"), v. t. [imp. &
   p. p. {Counterchecked} (-ch?ckt"); p. pr. & vb. n.
   {Counterchecking}.]
   To oppose or check by some obstacle; to check by a return
   check.