noun

The word "hatch" can have two main meanings.
An opening: This is like a door, but often in the floor, ceiling, or roof of a place.
To come out of an egg: This is what baby birds or insects do when they are fully grown inside the egg.

Example

1. The chicks will hatch from their eggs soon
2. We climbed down the hatch into the boat.
3. The farmer carefully opened the chicken coop to see if any chicks had hatched.