Meaning of conversation piece

conversa'tion piece"

Pronunciation: [key]
  1. any object that arouses comment because of some striking or unusual quality.
  2. group portraiture representing more or less fashionable people either in an interior or landscape setting.
  3. a play that relies for its effect mainly on the cleverness of its dialogue rather than on plot or action.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.