mastaba

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An ancient Egyptian tomb with a rectangular base, sloping sides, and a flat roof.

Century Dictionary and Cyclopedia

1. n. The earliest form of Egyptian tomb, a building oblong or square in plan and having sloping sides and a flat roof. It covers the sepulchral pit.

Wiktionary

1. n. A wide stone bench built into the wall of a house, shop etc. in the Middle East.
2. n. architecture A rectangular structure with a flat top and slightly sloping sides, built during Ancient Egyptian times above tombs that were situated on flat land. Mastabas were made of wood, mud bricks, stone, or a combination of these materials. Some are solid structures, while others can contain one or more rooms, sometimes decorated with paintings or inscriptions.

GNU Webster's 1913

1. In Mohammedan countries, a fixed seat, common in dwellings and in public places.
2. (Egyptology) A type of tomb, of the time of the Memphite dynasties, comprising an oblong structure with sloping sides (sometimes containing a decorated chamber, sometimes of solid masonry), and connected with a mummy chamber in the rock beneath.

WordNet 3.0

1. n. an ancient Egyptian mud-brick tomb with a rectangular base and sloping sides and flat roof