Source : Webster's Revised Unabridged Dictionary (1913)

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.

            The inside lined with rich carnation silk. --W.
                                                  Browne.

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

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

            Till coffee has her stomach lined.    --Swift.

   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.

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

   4. To impregnate; -- applied to brute animals. --Creech.

   {Lined gold}, gold foil having a lining of another metal.

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

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

            The lining of his coffers shall make coats To deck
            our soldiers.                         --Shak.

Source : WordNet®

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