Definitions

1. noun

A middle region, especially of the earth’s atmosphere, between the troposphere and the stratosphere.

“The meso region of the atmosphere is characterized by low pressure and frequent storms.”

2. prefix

Middle; in the middle of.

“Mesoamerica refers to the region in the Americas where several ancient civilizations flourished.”

3. adjective

Of or relating to the middle region of the atmosphere or the middle of a system or process.

“The meso pattern of high pressure is associated with fair weather.”

4. prefix

Middle; in the middle of.

“Meso- refers to the middle region of a system or process.”