Adjective
1. free from disturbance;
"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"2. not easily irritated;
"an equable temper""not everyone shared his placid temperament""remained placid despite the repeated delays"3. without untoward incident or disruption;
"a placid existence""quiet times"4. taking life easy;
"an easygoing man rarely stirred to anger""an air of placid sufficiency"