Murorum operatio
Defined in 4 dictionaries — Ballentine's (1916), Black's (1910), Black's (1891), Stimson (1881)
Ballentine's Law Dictionary
James A. Ballentine · 1916
A feudal service for the repair of walls or; fortifications. See Murage.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Lat. The service of work and labor done by inhabitants and adjoining tenants in building or repairing the walls of a city or castle; their personal service was commuted into murage, (q. v.) Cowell.
A Dictionary of Law
Henry Campbell Black · 1891
The service the walls of a city or castle; their personal service was commuted into murage, (gq. t.) Cowell.
Glossary of Technical Terms, Phrases, and Maxims of the Common Law
Frederic Jesup Stimson · 1881
I. The service of repairing castle walls or city walls; which was commuted into a money payment by the tenants, called murage; which name was also given to a toll for the same purpose, taken of every cart or horse passing through the town.