the GNU version of the Collaborative International Dictionary of English
n. The shelf of a mantel.
The Century Dictionary and Cyclopedia
n. That part of a mantelpiece which constitutes a shelf.
n. A mantelpiece.
Word Usage
"But as it happened, Banghurst had left a rook rifle he sometimes played with on the top of the desk, and on the corner of the mantelshelf was a tin with three or four cartridges remaining in it."