a long thick piece of wood, esp a piece of sawn timber used in constructing floors, roofs, and walls
a major article in an official programme, esp a policy that is fundamental to the declared aims of a political party
walk the plank
to be made to walk off the end of a plank jutting out from a ship, esp by pirates
planked adj
planking noun
[Middle English from early French planke, dialect form of planche, from Latin planca board, fem of plancus flat]