Entry 1 sense Webster, 1913 Celadon /sĕl'-əd-änˌ/ · Cel·a·don · IPA /ˈsɛləˌdɑn/ 01 n. A pale sea-green color; also, porcelain or fine pottery of this tint. 1. A pale sea-green color; also, porcelain or fine pottery of this tint.