sackcloth Meaning, Definition & Usage

  1. noun a garment made of coarse sacking; formerly worn as an indication of remorse
  2. noun a coarse cloth resembling sacking

WordNet

Sack"cloth` noun
Definitions
  1. Linen or cotton cloth such a 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. 31.
    Thus with sackcloth I invest my woe. Sandys.

Webster 1913