The process of shedding or casting off of the outgrown skin or exoskeleton in the process of growth; also, the cast-off skin itself: Jill read in the newspaper that some birds in her area change color during their winter molt.

To shed or lose feathers, hair, fur, skin, or horns periodically, especially seasonally: It is a fact that snakes molt in order to allow replacement of what is lost with new growth: