From Longman Dictionary of Contemporary Englishplacidplac‧id /ˈplæsɪd/ adjective 1 EMOTIONALa placid person does not often get angry or upset and does not usually mind doing what other people want them to a large, placid baby She sat still, placid and waiting.2 CALMcalm and peaceful The lake was placid and still under the moonlight. —placidly adverb Dobbs stood at the entrance, placidly smoking his pipe. —placidity /pləˈsɪdəti/ noun [uncountable]
Examples from the Corpus
placid• Some infants are intense, while others are more relaxed; some are squirmy and restless, while others are placid.• She floated listening on the placid amniotic tides.• He seemed to be placid and even cheerful.• My second child, for instance, was a placid baby who fed to routine from his earliest day and rarely cried.• All the eye can see are evergreens, a placid body of water and the occasional loon.• She's a sweet, placid child who rarely gets upset or angry.• There was a worried look on her normally placid face.• Half-closed, dozy eyes usually belong to a placid, lazy horse.• Phlegmatic: this type has a placid nature and tends to be lazy.• The setting sun turned the placid ocean into a sea of gold.• his placid round faceOrigin placid (1600-1700) Latin placidus, from placere; → PLEASE2 