Definition of plank noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//plæŋk//
    ; NAmE NAmE//plæŋk//
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  1. 1a long narrow flat piece of wood that is used for making floors, etc. a plank of wood a wooden plank
  2. 2a main point in the policy of an organization, especially a political party The central plank of the bill was rural development.
  3. Word OriginMiddle English: from Old Northern French planke, from late Latin planca ‘board’, feminine (used as a noun) of plancus ‘flat-footed’.Extra examples The proposed law was a central plank in the manifesto. the main plank of the strategy The bridge was made of planks held together with rope. The man was nailing down a loose plank. The timber was sawn down for planks.Idioms
    (as) thick as two short planks
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    (British English, informal) (of a person) very stupid More Like ThisSimiles in idioms (as) bald as a coot, (as) blind as a bat, (as) bright as a button, (as) bold as brass, as busy as a bee, as clean as a whistle, (as) dead as a/​the dodo, (as) deaf as a post, (as) dull as ditchwater, (as) fit as a fiddle, as flat as a pancake, (as) good as gold, (as) mad as a hatter/​a March hare, (as) miserable/​ugly as sin, as old as the hills, (as) pleased as Punch, as pretty as a picture, (as) regular as clockwork, (as) quick as a flash, (as) safe as houses, (as) sound as a bell, (as) steady as a rock, (as) thick as two short planks, (as) tough as old bootsSee worksheet.
    (in the past) to walk along a board placed over the side of a ship and fall into the sea, as a punishment
See the Oxford Advanced American Dictionary entry: plank