Entry 2 senses · 2 variants Webster, 1913 Placate /plāk'-āt/ · Plac·ate · IPA /ˈpleɪkeɪt/ n. v. t. 01 n. Same as Placard, 4 & 5. 1. Same as Placard, 4 & 5. See: Placard 02 v. t. To appease; to pacify; to concilate. imp. & p. p. Placated; p. pr. & vb. n. Placating 1. To appease; to pacify; to concilate.