Pronunciation: (un-tī'dē), [key]
—adj., -di•er, -di•est,
—v., -died, -dy•ing.
1. not tidy or neat; slovenly; disordered: an untidy room; an untidy person.
2. not well-organized or carried out: an untidy plan.
to mess up; disorder; disarrange: The guests untidied the room.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.