Bedeutung von “barrier” im Essential American English Dictionary

barrier

noun us /ˈbær·i·ər/

a wall that stops people from going into an area:

Police put up barriers to hold back the crowd.

something that prevents people from doing what they want to do:

Shyness is one of the biggest barriers to making friends.

(Definition von “barrier” aus dem Webster's Essential Mini Dictionary © Cambridge University Press)