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Webster 1913 Edition

Noun.

[F., fr. L.

terra

earth +

planus

even, level, plain.]

(Fort.)

The top, platform, or horizontal surface, of a rampart, on which the cannon are placed. See Illust. of

See also: terre-plein

terreplein ‎(plural terrepleins)

(military) A level space, often at the top of a rampart, and behind a parapet, on which artillery can be mounted.
(civil engineering) An embankment of earth with a broad level top, sometimes excavated to form a continuation of an elevated canal across a valley.