mantel
(less commonly), mantle1. a wooden or stone frame around the opening of a fireplace, together with its decorative facing
2. a shelf above this frame
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
Mantel
The frame and shelf surrounding the fireplace; often used to denote just the shelf.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
mantel
1. A beam or arch that supports the masonry above a fireplace; also called a mantel-tree.
2. All the construction or facing around a fireplace.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.