slipcover

[ slip-kuhv-er ]
/ ˈslɪpˌkʌv ər /

noun

a cover of cloth or other material for a piece of furniture, as an upholstered chair or sofa, made so as to be easily removable.
a book jacket.

verb (used with object)

to cover with a slipcover.

Origin of slipcover

First recorded in 1885–90; slip1 + cover

British Dictionary definitions for slipcover

slipcover
/ (ˈslɪpˌkʌvə) /

noun

US and Canadian a fitted but easily removable cloth cover for a chair, sofa, etc Also called (in Britain and certain other countries): loose cover
US and Canadian a book jacket; dust cover