A masonry unit used in construction, often used at the corners of buildings.

A cornerstone or the foundational aspect in a broader context.

किसी व्यापक संदर्भ में एक महत्वपूर्ण आधारशिला या तत्व।

English Usage: The regional quoin of their strategy was community engagement.

Hindi Usage: उनकी रणनीति का क्षेत्रीय क्वॉइन सामुदायिक भागीदारी था।