Learner's definition of BRINK
the brink
: the edge at the top of a steep cliff（峭壁顶端的）边缘—
usually used figuratively to refer to a point that is very close to the occurrence of something very bad or (less commonly) very good通常用作比喻，指灾难（较少指好事）即将发生的时刻 -
He nearly lost everything because of his drug addiction, but his friends helped to pull him back from the brink.他因为吸毒几乎失去了一切，但朋友们帮着把他从悬崖边缘拉了回来。
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The two nations are on the brink of war. [=are very close to war]两国正处于战争的边缘。
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a city on the brink of financial disaster面临金融灾难的城市
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Doctors may be on the brink of finding a cure for this disease.医生们可能很快就会找到治愈这种疾病的良方。
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a young actress who is on the brink of a brilliant career事业上即将步入辉煌的年轻女演员
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The other team brought them to the brink of defeat. [=came very close to defeating them]另一支球队差点把他们打败了。
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an animal that has been brought/pulled back from the brink of extinction摆脱灭绝之灾的动物