Meaning of BARRIER in English

noun any limit or boundary; a line of separation.

2. barrier ·noun an any obstruction; anything which hinders approach or attack.

3. barrier ·noun a fence or railing to mark the limits of a place, or to keep back a crowd.

4. barrier ·noun a fortress or fortified town, on the frontier of a country, commanding an avenue of approach.

5. barrier ·noun a carpentry obstruction, stockade, or other obstacle made in a passage in order to stop an enemy.

Webster English vocab.      Английский словарь Webster.