Definition of "mast" []

• Nautical A tall vertical spar, sometimes sectioned, that rises from the keel or deck of a sailing vessel to support the sails and the standing and running rigging. (noun)
• A vertical pole. (noun)
• A tall vertical antenna, as for a radio. (noun)
• A captain's mast. (noun)
• The nuts of forest trees accumulated on the ground, used especially as food for swine. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "We very soon carried out this project, and all of us working away to join our handkerchiefs, we had by the next afternoon a big flag flying from what we called our mast-head."
• "I can scarcely bring myself to realize that that great mast is really up and in; that you have lifted it from the water, swung it through the air, and deposited it here where it belongs."
• "When I turn on the radio, I get a grinding sound 'cos the worm screw on the radio mast is stripped."