concrete

adj. tangible, real, substantial

n. stonelike building material (containing cement, gravel, water, etc.); something tangible (idea, object, etc.)

v. solidify; set or cover in concrete

Concrete is a construction material that consists of cement (commonly Portland cement) as well as other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate such as gravel limestone or granite, plus a fine aggregate such as sand or manufactured sand and water) and chemical admixtures.
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adj. concrete, positive

adj. concrete, real, tangible, substantial

v. specify, particularize