/ ˈmjʊərəl; NAmE ˈmjʊrəl/ noun
a painting, usually a large one, done on a wall, sometimes on an outside wall of a building
► mural adjective :
mural paintings
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WORD ORIGIN
late Middle English : from French , from Latin muralis , from murus wall. The adjective was first used in mural crown ; later (mid 16th cent.) the sense placed or executed on a wall arose, reflected in the current noun use (dating from the early 20th cent.).