(of a body of water) free from disturbance by heavy waves; a ribbon of sand between the angry sea and the placid bay; the quiet waters of a lagoon; a lake of tranquil blue water reflecting a tranquil blue sky; a smooth channel crossing; scarcely a ripple on the still water; unruffled water

[ Syn: placid , quiet , still , smooth , unruffled ]

not agitated; without losing self-possession; spoke in a calm voice; remained calm throughout the uproar; he remained serene in the midst of turbulence; a serene expression on her face; she became more tranquil; tranquil life in the country

[ Syn: calm , unagitated , serene ]