Entry 1 sense Webster, 1913 Planishing · Plan·ish·ing · IPA 01 a. & vb. n. a. & vb. n. from Planish, v. t. 1. a. & vb. n. from Planish, v. t. See: Planish Phrases & compounds Planishing rolls — rolls between which metal strips are passed while cold, to bring them to exactly the required thickness.