B2 a long pole, fence, wall, or natural feature, such as a mountain or sea, that stops people from going somewhere隔栏;屏障;障碍物
UK a gate in some railway stations through which you must go to get on a train检票口
More examples
The land drops (away) sharply behind the barrier.
At the given signal, the group rushed forward to the barrier.
The barrier absorbed the main impact of the crash.
They've put barriers up to stop people (from) getting through.
The talks were meant to break down barriers between the two groups.
B2 anything that prevents people from being together or understanding each other障碍;阻碍;隔阂
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