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Cat door
01
a small hole in the bottom of the entrance door that is covered by a piece of often transparent plastic which easily swings to allow pets an easy way into and out of a house
Dialect
American
American
What is a "cat door"?
A cat door is a small door installed in a wall, door, or window, allowing cats to enter or exit a room or house freely. It is usually made of plastic or wood and has a flap that swings open when the cat pushes it. Some cat doors are designed to be locked or have a magnetic feature to keep the door secure when not in use. Cat doors provide cats with more independence, allowing them to go outside for exercise or use a litter box without needing help from their owners.
Examples
I installed a cat door so my cat can go outside whenever she wants.
