korice

1. (of a book, document) cover; binding
   Kupio sam izdanje u tvrdim koricama. — I bought the hardcover edition.
   Stavi pasoš u korice da se ne ošteti. — Put your passport in a cover so it doesn't get damaged.
2. (of a sword, knife) sheath; scabbard
   Vitez je izvukao mač iz korica. — The knight drew his sword from its sheath.

Usually used in the plural.