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.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI