Pronunciation: (dō'dō),[key] —n., —pl.-dos, -does. 1. any of several clumsy, flightless, extinct birds of the genera Raphus and Pezophaps, related to pigeons but about the size of a turkey, formerly inhabiting the islands of Mauritius, Réunion, and Rodriguez.
2. Slang.a dull-witted, slow-reacting person.
3. a person with old-fashioned, conservative, or outmoded ideas.
4. a thing that is outmoded or obsolete.