Ôrd'nance, n.

n. [From ordinance.] Heavy weapons of warfare; cannon, or great guns, mortars, and howitzers; artillery.

All the battlements their ordnance fire. Shak.

Then you may hear afar off the awful roar of his rifled ordnance. E. Everett.

Ordnance map, a very accurate map of the country, made from a survey conducted under direction of the ordnance department. [Eng.]