Definition of "tropopause" [tropopause]

• The boundary between the troposphere and the stratosphere varying in altitude from approximately 8 kilometers (5 miles) at the poles to approximately 18 kilometers (11 miles) at the equator. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Getting beyond the tropopause is a trick for us, but molecules manage to bumble their way beyond it anyway without our help."
• "The tropopause is the point of thermal equilibrium between the two and seems that this point would vary in height given a change in the GWP of the atmosphere as would the lapse rate by definition."
• "The tropopause is the “roof of weather”, the top of the weather-containing troposphere."