BAR'RIER. [See bar] 1. In fortification, a kind of fence made in a passage or retrenchment, composed of great stakes, with transums or overthwart rafters, to stop an enemy.2. A wall for defense.3. A fortress or fortified town on the frontier of a country.4. Any obstruction; any thing which confines, or which hinders approach,or attack; as constitutional barriers.5. A bar to mark the limits of a place; any limit, or boundary; a line of separation.
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