Read the dictionary definition of pouch. All definitions for this word.
1. a small or medium size container for holding or carrying things
2. (anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican)
3. an enclosed space
1. the trapped miners found a pocket of air
4. swell or protrude outwards
1. His stomach bulged after the huge meal
5. send by special mail that goes through diplomatic channels
6. put into a small bag