- (n.) A carpentry obstruction, stockade or other obstacle made in a passage in order to stop an enemy.
- (n.) An any obstruction; anything which hinders approach or attack.
- (n.) A fortress or fortified town, on the frontier of a country, commanding an avenue of approach.
- (n.) A fence or railing to mark the limits of a place or to keep back a crowd.
- (n.) Any limit or boundary; a line of separation.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). barrier. Retrieved September 21, 2026, from http://smartdefine.org/barrier/definitions/1978470 |
| Chicago | Webster's. 2011. "barrier" http://smartdefine.org/barrier/definitions/1978470 (accessed September 21, 2026). |
| Harvard | Webster's 2011, barrier, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/barrier/definitions/1978470>. |
| MLA | Webster's. "barrier" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/barrier/definitions/1978470> |