A mixture of gravel, pebbles, or broken stone with cement or with tar, etc., used for sidewalks, roadways, foundations, etc., and esp. for submarine structures.

A mixture of cement, sand, gravel and water that hardens into a stone- like substance. It can be poured into molds to make concrete blocks, or to make the frame of a building, or even to form the entire building.

A mixture of sand, coarse aggregate (crushed gravel or crushed stone), Portland cement and water correctly called Portland cement concrete. The wet mixture is placed in a form or trench and dries to a hard material.

a mixture of Portland cement, water and aggregate. The strength of concrete is measured in psi. The higher the cement content the stronger the concrete; all else being equal. The aggregate usually contains various sized particle from fine sand to gravel.

United in growth; hence, formed by coalition of separate particles into one mass; united in a solid form.

A compound or mass formed by concretion, spontaneous union, or coalescence of separate particles of matter in one body.

Sugar boiled down from cane juice to a solid mass.

To unite or coalesce, as separate particles, into a mass or solid body.

Standing for an object as it exists in nature, invested with all its qualities, as distinguished from standing for an attribute of an object; -- opposed to abstract.

Applied to a specific object; special; particular; -- opposed to general. See Abstract, 3.

the opposite of abstract - a concrete class is defined in enough detail so that objects can be constructed for it.

adj. real or specific; not imaginary or general; opposite of abstract.

means to write about things in a specific way.

Precise, specific.

1. of or relating to an actual, specific thing or instance; particular: had the concrete evidence needed to convict. 2. Existing in reality or in real experience; perceptible by the senses; real: concrete objects such as trees.