[{"Bold_text": "noun", "List Items": ["Nautical.a spar or structure rising above the hull and upper portions of a ship or boat to hold sails, spars, rigging, booms, signals, etc., at some point on the fore-and-aft line, as a foremast mainmast .any of a number of individual spars composing such a structure, as a topmast on trestletrees at the head of a lower mast lower mast.any of various portions of a single spar that are beside particular sails, as a top-gallant mast and royal mast royal mastformed as a single spar.", "a spar or structure rising above the hull and upper portions of a ship or boat to hold sails, spars, rigging, booms, signals, etc., at some point on the fore-and-aft line, as a foremast mainmast .", "any of a number of individual spars composing such a structure, as a topmast on trestletrees at the head of a lower mast lower mast.", "any of various portions of a single spar that are beside particular sails, as a top-gallant mast and royal mast royal mastformed as a single spar.", "Also called pillar .the upright support of a jib crane.", "any upright pole, as a support for an aerial, a post in certain cranes, etc."]}, {"Bold_text": "verb (used with object)", "List Items": ["to provide with a mast or masts."]}, {"Bold_text": "noun", "List Items": ["the fruit of the oak and beech or other forest trees, used as food for hogs and other animals."]}, {"Bold_text": null, "List Items": ["variant of masto- a vowel:mastectomy."]}]