Slab 2 topics · 2 sources ScienceEnergyA concrete pad that sits on gravel or crushed rock, well-compacted soil either level with the ground or above the ground.US DOE Office of Energy Efficiency & Renewable Energy — Glossary of Energy-Related Terms retrieved 2014-05-26 Cite ScienceWaterThe deck or floor of a concrete bridge.Bureau of Reclamation — Bureau of Reclamation Glossary Cite