Source : Webster's Revised Unabridged Dictionary (1913)

Lavatory \Lav"a*to*ry\, n.; pl. {Lavatories}. [L. lavatorium:
   cf. lavatoire. See {Lave} to wash, and cf. {Laver}.]
   1. A place for washing.

   2. A basin or other vessel for washing in.

   3. A wash or lotion for a diseased part.

   4. A place where gold is obtained by washing.