1 an object that keeps people or things separate or prevents them moving from one place to another 隔开人或东西的对象；栏障；藩篱: The crowd were all kept behind barriers. 人群都被挡在栏障后面。The mountains form a natural barrier between the two countries. 山脉形成了两国之间的天然屏障。 ☞Look at crash barrier. 参看 crash barrier。

2 a barrier (to sth) something that causes problems or makes it impossible for sth to happen 障碍: When you live in a foreign country, the language barrier is often the most difficult problem to overcome. 在外国生活，语言障碍往往是最难克服的问题。