A case for the reception of a sword, hunting knife, or other long and slender instrument; a scabbard.
- A case for a blade, as of a sword.
- Any of various similar coverings.
- Biology An enveloping tubular structure, such as the base of a grass leaf that surrounds the stem or the tissue that encloses a muscle or nerve fiber.
- A close-fitting dress.
- A condom.
- To encase or cover with or as if with a sheath; sheathe.