From Longman Dictionary of Contemporary English Related topics:Architecture,Human,Shapes, patternsarch1/ɑːtʃ$ɑːrtʃ/●●○noun[countable]1 astructurewith acurvedtop andstraightsides that supports theweightof abridgeor building2a curved structureabovea door, window etc3a curved structure of...
3. A curve with the ends down and the middle up: the arch of a raised eyebrow. 4. Anatomy An organ or structure having a curved or bowlike appearance, especially either of two arched sections of the bony structure of the foot. v. arched, arch·ing, arch·es ...