n.1.The top sheaf of a stack of grain: (fig.) the crowning or finishing part of a thing.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Woman is the capsheaf of the abomination of desolation--full of all deviltry." He also announced the unhappy fate awaiting "all who say that immersion with clothes on is baptism....