coat1 S2 W3 [countable]
a piece of clothing with long sleeves that is worn over your clothes to protect them or to keep you warm: ➔ morning coat
Billy! Put your coat on, it's cold outside!
The kids took off their coats and threw them on the floor.
I need a new winter coat.
The lab assistants wear long white coats.
2DCC American English
a jacket that you wear as part of a suit [= jacket]
the fur, wool, or hair that covers an animal's body:
a dog with a glossy coat
a thin layer of a paint or other substance that you spread thinly over the surface of something
He applied a light coat of varnish.