Meaning

noun a loud harsh or strident noise

noun loud and persistent outcry from many people

verb make loud demands

originRecorded in English since c. 1385, as Middle English clamour, from Old French clamor (modern clameur), from Latin clāmor (“a shout, cry”), from clāmō (“cry out, complain”). The verb sense "to silence" may have a distinct (unknown) etymology.

Etymology from Wiktionary, CC BY-SA 3.0