sheath /ʃiːθ/ noun8 •A holster for a sword; a scabbard. •Anything that has a similar shape to a scabbard that is used to hold an object that is longer than it is wide. •The insulating outer cover of an electrical cable. •(UK, informal) A condom. •A tight-fitting dress. •The base of a leaf when sheathing or investing a branch or stem, as in grasses. •The foreskin of certain animals (for example, dogs and horses). •One of the elytra of an insect. formssheaths