The Collaborative International Dictionary of English v.0.48:

dildo \dil"do\ (d[i^]l"d[-o]), n.
   A burden in popular songs. [Obs.]
   [1913 Webster]

         Delicate burthens of dildos and fadings. --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dildo \Dil"do\, n. (Bot.)
   A columnar cactaceous plant of the West Indies (Cereus
   Swartzii).
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

dildo \dil"do\ (d[i^]l"d[-o]), n.
   a device shaped like an erect penis, used by some women for
   sexual stimulation. [Slang]
   [PJC]

WordNet (r) 3.0 (2006):

dildo
    n 1: a vibrating device that substitutes for an erect penis to
         provide vaginal stimulation