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N-COUNT
（彩票奖金的）累积，顺延，滚动增加
In a lottery draw, a rollover is a prize that includes the prize money from the previous draw, because nobody won it.
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N-COUNT
（贷款等的）延期，展期
In finance, a rollover is when a loan or other financial arrangement is extended.
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N-COUNT
翻车;翻船;倾翻
A rollover is an incident where a vehicle or boat turns over completely, usually finishing the right way up.
例句
It is hoped anti-lock brakes will prevent rollovers.
人们希望防抱死刹车装置能够防止翻车。