Meaning of BARRIER in English

n.1 a fence or other obstacle that bars advance or access.

2 an obstacle or circumstance that keeps people or things apart, or prevents communication (class barriers; a language barrier).

3 anything that prevents progress or success.

4 a gate at a car park, railway station, etc., that controls access.

5 colloq. sound barrier.

Phrases and idioms:

barrier cream a cream used to protect the skin from damage or infection. barrier reef a coral reef separated from the shore by a broad deep channel.

Etymology: ME f. AF barrere, OF barriere

Oxford English vocab.      Оксфордский английский словарь.