There are 2 main definitions of mast in English:

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mast1

Syllabification: mast
Pronunciation: /mast
 
/

noun

1A tall upright post, spar, or other structure on a ship or boat, in sailing vessels generally carrying a sail or sails.
Example sentences
  • Also in the water were strange vessels, with no masts or sails, built of gunmetal-gray metals that seemed impervious to the rust that had afflicted the dock facilities.
  • She had two masts and carried fore-and-aft auxiliary sails.
  • Before the battle was over the Téméraire was virtually impossible to sail, her masts and rigging having been all but wrecked, but she still managed to keep firing on the enemy.
Synonyms
spar, boom, yard, gaff, foremast, mainmast, topmast, mizzen-mast, mizzen, royal mast
1.1A tall upright structure on land, especially a flagpole or a television or radio transmitter.
Example sentences
  • The spokeswoman said there was no conclusive evidence that made a link between exposure to radio waves, transmitter masts and long-term public health risks.
  • One of the last battles against police radio masts being put up in the North York Moors national park looks likely to be lost despite continued concerns about the impact on health and the landscape.
  • It is understood the difficulties centre on problems caused by the built-up nature of Greater Manchester and the fact that many masts and transmitters operate at once.
Synonyms
flagpole, flagstaff, pole, post, rod, upright;
aerial, transmitter, pylon
2 (in full captain's mast) (In the US Navy) a session of court presided over by the captain of a ship, especially to hear cases of minor offenses.
Example sentences
  • It didn't cost him anything, but he had a record of being at Captain's mast and it said, "Appropriate punishment was assigned by the Captain."
  • Asked later by a member of my squad what infraction caused me to appear at captain's mast, I said, "I don't want to talk about it."
  • He grabbed the two service records out of my hand and told me that he was sending them to Captain's Mast.

Origin

Old English mæst; related to Dutch mast and German Mast.

Phrases

before the mast

1
historical Serving as an ordinary seaman in a sailing ship (quartered in the forecastle).
Example sentences
  • A day to celebrate a great Victory so slipping back to my youthful days before the mast as a boy sailor I will be happy to join in the traditional Naval celebrations.
  • Such is our time before the mast in Tahiti - until departure becomes as inevitable as work and taxes.
  • It is surprising how many men who come from the inland counties have sailed before the mast.

Derivatives

masted

1
adjective
[in combination]: a single-masted fishing boat

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There are 2 main definitions of mast in English:

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mast2

Syllabification: mast
Pronunciation: /mast
 
/

noun

The fruit of beech, oak, chestnut, and other forest trees, especially as food for pigs and wild animals.
Example sentences
  • He explains that the native rats ate many kinds of berries, beech mast, and other wholesome foods of the forest.
  • All sites experienced at least one mast failure, and mast failure years were generally consistent across sites.
  • The first assumption is that mast crops and small mammal populations are synchronized across a wide range.

Origin

Old English mæst; probably related to meat.

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