Real Dictionary

concrete
Concrete is a substance used for building which is made by mixing together cement, sand, small stones, and water.
verb: When you concrete something such as a path, you cover it with concrete.

concrete in American English
formed into a solid mass; coalesced
adjective: constituting an actual thing or instance; real
intransitive verb: to coalesce into a mass; become solid; harden
noun: an artificial, stonelike material used for various structural purposes, made by mixing cement and various aggregates, as sand, pebbles, gravel, or shale, with water and allowing the mixture to harden
transitive verb: to treat or lay with concrete

concrete in British English
adjective: relating to a particular instance or object; specific as opposed to general
noun: a construction material made of a mixture of cement, sand, stone, and water that hardens to a stonelike mass
verb: to construct in or cover with concrete

concrete in Mechanical Engineering
noun: Concrete is a hard substance made by mixing cement, sand, and small stones.