tr.v. plan·ished, plan·ish·ing, plan·ish·es
To smooth (metal) by rolling or hammering.
[Middle English *planishen, from Old French planir, planiss-, to make smooth, from plan, level, from Latin plānus; see pelə- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.