Tenter trier, or prover, a machine or frame, used in the cloth manufactory, to stretch out the pieces of cloth, and make them set even and square. It is usually about 4 1/2 feet high, and for length exceeds that of the longest piece of cloth. It consists of several long square pieces of wood, placed like those which form the barriers of a menage; so, however, as that the lower cross pieces of wood may be raised or lowered, as is found requisite, to be fixed at any height, by means of pins. Along the cross pieces, both the upper and the lower one, are numerous sharp hooked nails, called tenter-hooks, on which the selvages of the cloth are hooked.