|Origin:||barriere, from barre; BAR1|
bar‧ri‧er W3 [countable]
a rule, problem etc that prevents people from doing something, or limits what they can do:
the removal of trade barriers (=something such as a tax that makes trade between countries difficult)
Problems with childcare remain the biggest barrier to women succeeding at work.
barriers between doctors and patients
The language barrier (=the inability to talk with someone because you speak a different language) makes debate impossible.
a type of fence or gate that prevents people from moving in a particular direction:
Crowds burst through the barriers and ran onto the pitch.
a physical object that keeps two areas, people etc apart
The mountains form a natural barrier between the two countries.
a level or amount of 10 seconds, 40% etc, that is seen as a limit which it is difficult to get beyond:
I'm hoping to crash the 20-second barrier in the final and get a bronze.