The Collaborative International Dictionary of English v.0.48:

Gasket \Gas"ket\, n. [Cf. F. garcette, It. gaschetta, Sp. cajeta
   caburn, garceta reef point.]
   1. (Naut.) A line or band used to lash a furled sail
      securely. Sea gaskets are common lines; harbor gaskets
      are plaited and decorated lines or bands. Called also
      casket.
      [1913 Webster]

   2. (Mech.)
      (a) The plaited hemp used for packing a piston, as of the
          steam engine and its pumps.
      (b) Any ring or washer of made of a compressible material,
          used to make joints impermeable to fluids.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Casket \Cas"ket\, n. (Naut.)
   A gasket. See Gasket.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Casket \Cas"ket\, v. t.
   To put into, or preserve in, a casket. [Poetic] "I have
   casketed my treasure." --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Casket \Cas"ket\, n. [Cf. F. casquet, dim. of casque belmet, fr.
   Sp. casco.]
   1. A small chest or box, esp. of rich material or ornamental
      character, as for jewels, etc.
      [1913 Webster]

            The little casket bring me hither.    --Shak.
      [1913 Webster]

   2. A kind of burial case. [U. S.]
      [1913 Webster]

   3. Anything containing or intended to contain something
      highly esteemed; as:
      (a) The body. (--Shak.)
      (b) The tomb. (--Milton).
      (c) A book of selections. [poetic]
          [1913 Webster]

                They found him dead . . . an empty casket.
                                                  --Shak.
          [1913 Webster]

WordNet (r) 3.0 (2006):

casket
    n 1: box in which a corpse is buried or cremated [syn: coffin,
         casket]
    2: small and often ornate box for holding jewels or other
       valuables [syn: casket, jewel casket]
    v 1: enclose in a casket

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "casket":
   bottle up, box, box in, box up, burial case, cabin, case, chest,
   cloister, closet, coffer, coffin, confine, container, cramp, crib,
   encase, entomb, immure, kist, mummy case, receptacle, sarcophagus,
   straiten