0 (of a baby bird, fish, etc.) to come out of its egg at birth -- éclore
when the eggs/babies hatch quand les œufs éclosent / bébés naissent
1 (the door or cover of) an opening in a wall, floor, ship’s deck etc -- passe-plats
2 to produce (young birds etc) from eggs -- faire éclore
My hens have hatched ten chicks.
3 to break out of the egg -- éclore
These chicks hatched this morning.
4 to become young birds -- éclore
Four of the eggs have hatched.
5 to plan (something, usually bad) in secret -- (se) tramer
They hatched a plot to kidnap a rich businessman.