(noun)
(British) a type of cotton fabric, often plain white in color, and heavier than muslin in texture/weight;
e.g. The curtains were made from calico that had been crudely sewn.
(adjective)
having a mottled appearance with patches or blotches of different colors, especially patches of black and reddish-brown on white, describing an animal's fur;
e.g. He had a calico cat that was very friendly.