n. pl. Among leather dealers, the thickest and stoutest tanned hides. [ 1913 Webster ]

n. [ 2d back, n. + saw. ] A saw (as a tenon saw) whose blade is stiffened by an added metallic back. [ 1913 Webster ]

n. [ Back, adv. + set. ] 1. A check; a relapse; a discouragement; a setback. [ 1913 Webster ]

2. Whatever is thrown back in its course, as water. [ 1913 Webster ]

Slackwater, or the backset caused by the overflow. Harper's Mag. [ 1913 Webster ]

v. t. To plow again, in the fall; -- said of prairie land broken up in the spring. [ Western U.S. ] [ 1913 Webster ]

n. [ Back, a. + settler. ] One living in the back or outlying districts of a community. [ 1913 Webster ]

The English backsettlers of Leinster and Munster. Macaulay. [ 1913 Webster ]

{ ‖ ‖ } n. [ Pers. bakhshīsh, fr. bakhshīdan to give. ] In Egypt and the Turkish empire, a relatively small amount of money given for services rendered (as by a waiter); a gratuity; a “tip”.
Syn. -- gratuity, tip, baksheesh, bakshish, bakshis. [ 1913 Webster + WordNet 1.5 ]

n. [ Back, a. + side. ] The hinder part, posteriors, or rump of a person or animal. [ 1913 Webster ]

☞ Backside (one word) was formerly used of the rear part or side of any thing or place, but in such senses is now two words. [ 1913 Webster ]

n. [ Back, adv. + sight. ] (Surv.) The reading of the leveling staff in its unchanged position when the leveling instrument has been taken to a new position; a sight directed backwards to a station previously occupied. Cf. Foresight, n., 3. [ 1913 Webster ]

v. i. [ imp. Backslid p. p. Backslidden Backslid; p. pr. & vb. n. Backsliding. ] [ Back, adv. + slide. ] To slide back; to fall away; esp. to abandon gradually the faith and practice of a religion that has been professed. [ 1913 Webster ]

n. One who backslides. [ 1913 Webster ]