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Definition of mast:

  1. A pole, or long, strong, round piece of timber, or spar, set upright in a boat or vessel, to sustain the sails, yards, rigging, etc. A mast may also consist of several pieces of timber united by iron bands, or of a hollow pillar of iron or steel.
  2. A spar or strut to which tie wires or guys are attached for stiffening purposes.
  3. The fruit of the oak and beech, or other forest trees; nuts; acorns.
  4. The vertical post of a derrick or crane.
  5. To furnish with a mast or masts; to put the masts of in position; as, to mast a ship.


post, amidships, camera, bunting, ensign, checkered flag, DAB, flagpole, jurymast, color, lower mast, topgallant mast, aerial, bilge, CRT, mizzenmast, pole, decoder, bay, communications satellite, trunk, cathode ray tube, cue card, antenna, jigger, timber, clock radio, berth, blade, hammer and sickle, aft, Blue Peter, mizzen, foremast, boom, topmast, flagstaff, bowsprit, flag, beam, bow, Jolly Roger, Maypole.

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