A coat.
A unit of thermal resistance, being ten times the temperature difference (in °C) between the two surfaces of a material when the flow of heat is equal to one watt per square metre
A cloak.
To dress (often with up or out).
A warm coat, often an overcoat, fit to be worn in winter
An animal's seasonal appearance in winter, notably thicker and/or otherwise camouflaged plumage or fur after (often autumnal) moulting