Emily Dickinson Lexicon

MU'RAL, a. [L. muralis, from murus, a wall; W. mur, the which is fixed or firm; muriaw; to fix or establish. It seem to belong to the root of moor, to make fast, as a ship.]

1. Pertaining to a wall. Soon repaired her mural breach. Milton.
2. Resembling a wall; perpendicular or steep; as, a mural precipice. Mural crown, among the ancient Romans, a golden crown or circle of gold, indented and embattled, bestowed on him who first mounted the wall of a besieged place and there lodged a standard. Encyc.