Source : Webster's Revised Unabridged Dictionary (1913)

Advertisement \Ad*ver"tise*ment\ ([a^]d*v[~e]r"t[i^]z*ment or
   [a^]d`v[~e]r*t[imac]z"ment; 277), n. [F. avertisement,
   formerly also spelled advertissement, a warning, giving
   notice, fr. avertir.]
   1. The act of informing or notifying; notification. [Archaic]

            An advertisement of danger.           --Bp. Burnet.

   2. Admonition; advice; warning. [Obs.]

            Therefore give me no counsel: My griefs cry louder
            than advertisement.                   --Shak.

   3. A public notice, especially a paid notice in some public
      print; anything that advertises; as, a newspaper
      containing many advertisements.

Source : WordNet®

advertisement
     n : a public promotion of some product or service [syn: {ad}, {advertizement},
          {advertising}, {advertizing}, {advert}]