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barrier

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barrier/ˈberijɚ/noun
pluralbarriers
barrier
/ˈberijɚ/
noun
pluralbarriers
Learner's definition of BARRIER  
[count]
: something (such as a fence or natural obstacle) that prevents or blocks movement from one place to another
: a law, rule, problem, etc., that makes something difficult or impossible
   b  : something that makes it difficult for people to understand each other — often + between
: a level, amount, or number that is difficult to get past
— see also sound barrier
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