a portable toilet, especially one on a chairlike frame with wheels, as for an invalid.
5.
an elaborate headdress consisting chiefly of a high framework decorated with lace, ribbons, etc., worn perched on top of the hair by women in the late 17th and early 18th centuries.
1786, "chest of drawers," earlier (1688) a fashionable ladies' headdress, from Fr., noun use of adj. commode "convenient, suitable," from L. commodus "suitable," from com- intens. prefix + modus "measure, manner." Meaning of "chair housing a chamber pot" first attested 1851 from notion of convenience.