strato·sphere 
/ˈstrætəˌsfiɚ/ noun
/ˈstrætəˌsfiɚ/ noun Meaning:
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. [=has become extremely expensive] ▪ His career is clearly headed for the stratosphere.
▪ Tuition at many colleges has soared into the stratosphere. [=has become extremely expensive] ▪ His career is clearly headed for the stratosphere.
