placid Meaning, Definition & Usage

  1. adjective satellite (of a body of water) free from disturbance by heavy waves
    smooth; quiet; unruffled; tranquil; still.
    • 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. adjective satellite not easily irritated
    equable; even-tempered; good-tempered.
    • an equable temper
    • not everyone shared his placid temperament
    • remained placid despite the repeated delays

WordNet

Plac"id adjective
Etymology
L. placidus, originally, pleasing, mild, from placere to please: cf. F. placide. See Please.
Definitions
  1. Pleased; contented; unruffied; undisturbed; serene; peaceful; tranquil; quiet; gentle. "That placid aspect and meek regard." Milton. "Sleeping . . . the placid sleep of infancy." Macaulay.

Webster 1913