A plank is a board or another rectangular piece of wood. When you're building your four-story treehouse, you'll need a lot of planks.

If you've ever watched a movie about pirates, you've heard of "walking the plank," a despicable way to punish captives, forcing them to plunge off the end of a plank (or a "gang plank") into the ocean below. Planks are more commonly used to build houses or hold a fish as it cooks on a grill. Another kind of plank is a political platform, like a candidate's environmental plank, focused on reducing carbon emissions.

Definitions of plank
  1. noun
    a stout length of sawn timber; made in a wide variety of sizes and used for many purposes
    synonyms: board
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    a board that has a groove cut into one edge and a tongue cut into the other so they fit tightly together (as in a floor)
    one of a pair of planks used to make a track for rolling or sliding objects
    strake, wale
    thick plank forming a ridge along the side of a wooden ship
    chipboard, hardboard
    a cheap hard material made from wood chips that are pressed together and bound with synthetic resin
    a plank of softwood (fir or pine board)
    garboard, garboard plank, garboard strake
    the first wale laid next to the keel of a wooden ship
    gun rest, gunnel, gunwale
    wale at the top of the side of boat; topmost planking of a wooden vessel
    type of:
    lumber, timber
    the wood of trees cut and prepared for use as building material
  2. verb
    cover with planks
    “The streets were planked
    synonyms: plank over
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    type of:
    provide with a covering or cause to be covered
  3. verb
    cook and serve on a plank
    “Planked vegetable”
    Planked shad”
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    type of:
    dish, dish out, dish up, serve, serve up
    provide (usually but not necessarily food)
  4. verb
    set (something or oneself) down with or as if with a noise
    “He planked the money on the table”
    “He planked himself into the sofa”
    synonyms: flump, plonk, plop, plump, plump down, plunk, plunk down
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    type of:
    place down, put down, set down
    cause to sit or seat or be in a settled position or place
  5. noun
    an endorsed policy in the platform of a political party
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    type of:
    a line of argument rationalizing the course of action of a government
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