An open recess in a wall at the base of a chimney where a fire can be built WordNet 3.0 & Open English WordNet

A fireplace or hearth is a structure made of brick, stone or metal designed to contain a fire. Wikipedia

A hearth is the place in a home where a fire is or was traditionally kept for home heating and for cooking, usually constituted by at least a horizontal hearthstone and often enclosed to varying degrees by any combination of reredos, fireplace, oven, smoke hood, or chimney. Wikipedia

Device for firing solid fuels in residential buildings Wikidata

Brick- or stone-lined fireplace Wikidata

An open recess in a wall at the base of a chimney where a fire may be built. OmegaWiki

An open hearth for holding a fire at the base of a chimney. Wiktionary

Open hearth. Wiktionary (translation)