tarmac

(redirected from Tar macadam)
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Related to Tar macadam: tarmacadam

macadam, tarmac, tarmacadam

1. A paving for roads or other surfaces, formed by grading and compacting layers of crushed stone or gravel; then the top layer(s) are usually bound by asphaltic material, acting to stabilize the stone, provide a smoother surface, and seal against water penetration.
2. The crushed stone used in a macadamized surface.

tarmac

A hard-surface area on an airport where aircraft are parked, tied down, and serviced. Such areas in front of a hangar are also called tarmac. The term owes its origin to tarmacadam—a mixture of tar and crushed stones used as surfacing material.