Source : Webster's Revised Unabridged Dictionary (1913)

Million \Mil"lion\, n. [F., from LL. millio, fr. L. mille a
   thousand. See {Mile}.]
   1. The number of ten hundred thousand, or a thousand
      thousand, -- written 1,000, 000. See the Note under
      {Hundred}.

   2. A very great number; an indefinitely large number.

            Millions of truths that a man is not concerned to
            know.                                 --Locke.

   3. The mass of common people; -- with the article the.

            For the play, I remember, pleased not the million.
                                                  --Shak.

Source : WordNet®

million
     adj : (in Roman numerals, M written with a macron over it)
           denoting a quantity consisting of 1,000,000 items or
           units [syn: {a million}]

million
     n : the number that is represented as a one followed by 6 zeros
         [syn: {1000000}, {one thousand thousand}, {meg}]