SINCE 1828
the stratosphere
nounDefinition of the stratosphere
1
: 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
2
: a very high position, level, or amount
Tuition at many colleges has soared into the stratosphere. His career is clearly headed for the stratosphere.
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