A hatch is an opening or door that lets people or things come out from a confined space. This can also refer to a young bird breaking out of its egg.
When we talk about hatches in everyday life, it usually means a way out, like a door on a train or a boat. You might see signs saying "Hatch" at airports or ports when you're traveling by plane or ship. The hatch is the opening that lets passengers get on and off safely. On trains, it's often used for luggage or even as an emergency exit.
If you're thinking about animals, you might hear people talk about a chick hatching from its egg – this is a cute stage in a bird's life when it starts to break out of the shell.
A horizontal door in a floor or ceiling.
To close with a hatch or hatches.
