Source : Webster's Revised Unabridged Dictionary (1913)

Odor \O"dor\, n. [OE. odor, odour, OF. odor, odour, F. odeur,
   fr. L. odor; akin to olere to smell, Gr. ?, Lith. ? Cf.
   {Olfactory}, {Osmium}, {Ozone}, {Redolent}.] [Written also
   {odour}.]
   Any smell, whether fragrant or offensive; scent; perfume.

         Meseemed I smelt a garden of sweet flowers, That dainty
         odors from them threw around.            --Spenser.

   {To be in bad odor}, to be out of favor, or in bad repute.

Source : WordNet®

odor
     n 1: any property detected by the olfactory system [syn: {olfactory
          property}, {smell}, {aroma}, {odour}, {scent}]
     2: the sensation that results when olfactory receptors in the
        nose are stimulated by particular chemicals in gaseous
        form; "she loved the smell of roses" [syn: {smell}, {odour},
         {olfactory sensation}, {olfactory perception}]