'Commode' definitions:

Definition of 'commode'

noun

A plumbing fixture for defecation and urination [syn: toilet, can, commode, crapper, pot, potty, stool, throne]

noun

A tall elegant chest of drawers [syn: chiffonier, commode]

From: GCIDE

Commode \Com*mode"\, n. [F. commode, fr. commode convenient, L. commodus; com- + modus measure, mode. See Mode.]
1. A kind of headdress formerly worn by ladies, raising the hair and fore part of the cap to a great height. [1913 Webster]
Or under high commodes, with looks erect. --Granville. [1913 Webster]
2. A piece of furniture, so named according to temporary fashion; as: (a) A chest of drawers or a bureau. (b) A night stand with a compartment for holding a chamber vessel. (c) A kind of close stool. (d) A movable sink or stand for a wash bowl, with closet. [1913 Webster]

From: GCIDE

Lavatory \Lav"a*to*ry\, n.; pl. Lavatories. [L. lavatorium: cf. lavatoire. See Lave to wash, and cf. Laver.]
1. A place for washing. [1913 Webster]
2. A basin or other vessel for washing in. [1913 Webster]
3. A wash or lotion for a diseased part. [1913 Webster]
4. A place where gold is obtained by washing. [1913 Webster]
5. A room containing one or more sinks for washing, as well as one or more toilet fixtures; also called bathroom, toilet, and sometimes commode. Commode and toilet may refer to a room with only a toilet fixture, but without a sink.
Syn: toilet, lavatory, can, facility, john, privy, bathroom. [WordNet 1.5 +PJC]