Source : Webster's Revised Unabridged Dictionary (1913)

Lotion \Lo"tion\, n. [L. lotio, fr. lavare, lotum, to wash: cf.
   F. lotion. See {Lave} to wash.]
   1. A washing, especially of the skin for the purpose of
      rendering it fair.

   2. A liquid preparation for bathing the skin, or an injured
      or diseased part, either for a medicinal purpose, or for
      improving its appearance.

Source : WordNet®

lotion
     n 1: any of various cosmetic preparations that are applied to the
          skin
     2: liquid preparation having a soothing or antiseptic or
        medicinal action when applied to the skin; "a lotion for
        dry skin" [syn: {application}]