[n] a coarse cloth resembling sacking
[n] a garment made of coarse sacking; formerly worn as an indication of remorse
\Sack"cloth`\ (?; 115), n. Linen or cotton cloth such as sacks are made of; coarse cloth; anciently, a cloth or garment worn in mourning, distress, mortification, or penitence. Gird you with sackcloth, and mourn before Abner. --2 Sam. iii. 3
1. Thus with sackcloth I invest my woe. --Sandys.