Source : Webster's Revised Unabridged Dictionary (1913)

Dram \Dram\, n. [OF. drame, F. drachme, L. drachma, drachm,
   drachma, fr. Gr. ?, prop., a handful, fr. ? to grasp. Cf.
   {Drachm}, {Drachma}.]
   1. A weight; in Apothecaries' weight, one eighth part of an
      ounce, or sixty grains; in Avoirdupois weight, one
      sixteenth part of an ounce, or 27.34375 grains.

   2. A minute quantity; a mite.

            Were I the chooser, a dram of well-doing should be
            preferred before many times as mush the forcible
            hindrance of evildoing.               --Milton.

   3. As much spirituous liquor as is usually drunk at once; as,
      a dram of brandy; hence, a potation or potion; as, a dram
      of poison. --Shak.

   4. (Numis.) A Persian daric. --Ezra ii. 69.

   {Fluid dram}, or {Fluid drachm}. See under {Fluid}.

Dram \Dram\, v. i. & t.
   To drink drams; to ply with drams. [Low] --Johnson.
   --Thackeray.

Source : WordNet®

dram
     n 1: a unit of apothecary weight equal to an eighth of an ounce
          or to 60 grains [syn: {drachm}, {drachma}]
     2: 1/16 ounce or 1.771 grams
     3: the basic unit of money in Armenia

Source : Free On-Line Dictionary of Computing

DRAM
     
        {dynamic random access memory}