verb (used with object) 1.to give a smooth finish to (metal) by striking lightly with a smoothly faced hammer or die.
2.to give a smooth finish to (metal, paper, etc.) by passing through rolls.
Origin: 1350–1400; Middle English planyssyng (gerund) <
Old French planiss-, long stem of
planir to smooth, derivative of
plan level <
Latin plānus plain1 Related forms plan·ish·er, noun
un·plan·ished, adjective