the GNU version of the Collaborative International Dictionary of English
n. In early times, a separate building, usually polygonal, used for baptismal services. Small churches were often changed into baptisteries when larger churches were built near.
n. A part of a church containing a font and used for baptismal services.
The Century Dictionary and Cyclopedia
n. A building or a portion of a building in which is administered the rite of baptism.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. bowl for baptismal water
Word Usage
"The baptistery is a beautiful fount of carved stone."