:the upper layer of the Earth's atmosphere that begins about 7 miles (11 kilometers) above the Earth's surface and ends about 30 miles (50 kilometers) above the Earth's surface平流层(距地表大约11至50千米之间的大气层)
2
:a very high position, level, or amount最上层的;最高档次的
Tuition at many colleges has soared into the stratosphere. [=has become extremely expensive]许多大学的学费涨到极高。
His career is clearly headed for the stratosphere.他无疑正在步入职业生涯的巅峰。