barrier (EN)

noun

noun “barrier”

1. a physical structure that blocks movement from one place to another
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   The crowd pushed against the security barriers, eager to see the stars on the red carpet.
2. something that prevents or restricts progress or communication
   Language can be a barrier for people moving to a new country.
3. a limit or boundary beyond which something cannot or should not go
   Scientists worked hard to break the sound barrier.