The Collaborative International Dictionary of English v.0.48:

Lining \Lin"ing\ (l[imac]n"[i^]ng), n. [See Line to cover the
   in side.]
   1. The act of one who lines; the act or process of making
      lines, or of inserting a lining.
      [1913 Webster]

   2. That which covers the inner surface of anything, as of a
      garment or a box; also, the contents of anything.
      [1913 Webster]

            The lining of his coffers shall make coats
            To deck our soldiers.                 --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Line \Line\, v. t. [imp. & p. p. Lined (l[imac]nd); p. pr. &
   vb. n. Lining.] [See Line flax.]
   1. To cover the inner surface of; as, to line a cloak with
      silk or fur; to line a box with paper or tin.
      [1913 Webster]

            The inside lined with rich carnation silk. --W.
                                                  Browne.
      [1913 Webster]

   2. To put something in the inside of; to fill; to supply, as
      a purse with money.
      [1913 Webster]

            The charge amounteth very high for any one man's
            purse, except lined beyond ordinary, to reach unto.
                                                  --Carew.
      [1913 Webster]

            Till coffee has her stomach lined.    --Swift.
      [1913 Webster]

   3. To place persons or things along the side of for security
      or defense; to strengthen by adding anything; to fortify;
      as, to line works with soldiers.
      [1913 Webster]

            Line and new repair our towns of war
            With men of courage and with means defendant.
                                                  --Shak.
      [1913 Webster]

   4. To impregnate; -- applied to brute animals. --Creech.
      [1913 Webster]

   Lined gold, gold foil having a lining of another metal.
      [1913 Webster]

WordNet (r) 3.0 (2006):

lining
    n 1: a protective covering that protects an inside surface [syn:
         lining, liner]
    2: a piece of cloth that is used as the inside surface of a
       garment [syn: liner, lining]
    3: providing something with a surface of a different material
       [syn: lining, facing]
    4: the act of attaching an inside lining (to a garment or
       curtain etc.)

Moby Thesaurus II by Grady Ward, 1.0:

95 Moby Thesaurus words for "lining":
   Smyth sewing, backing, bibliopegy, binder board, binding,
   book cloth, book cover, book jacket, bookbinding, bookcase, burr,
   bush, bushing, case, casemaking, casing-in, chiseling, collating,
   collating mark, cover, cross-hatching, demitint, doubling,
   doublure, dust cover, dust jacket, engravement, engraving, etch,
   etching, facing, filler, filling, folding, footband, gathering,
   gem-engraving, glass-cutting, gluing-off, glyptic, graving,
   half tint, hard binding, hatching, headband, incision, inlay,
   inlayer, inscript, inscription, insole, interlineation, jacket,
   library binding, line, liner, lining-up, marking,
   mechanical binding, niggerhead, packing, padding, perfect binding,
   plastic binding, rounding, saddle stitching, score, scoring,
   scratch, scratching, sewing, side sewing, signature, slash,
   slashing, slipcase, slipcover, smashing, soft binding,
   spiral binding, stamping, stapling, stipple, stippling, stuffing,
   tailband, tint, tipping, tooling, trimming, type-cutting, wadding,
   wainscot, wire stitching, wrapper