- a tall spar or, now often, a hollow metal structure, sometimes in sections, rising vertically from the keel or deck of a vessel and used to support the sails, yards, radar and radio equipment, etc.
- a specified section of this: the topmast
- any vertical pole, as in a crane or derrick
- a metal post for the support of a radio aerial or television antenna
- [alsoM-]U.S. Navy a summary session held by the commanding officer to try minor offenses, hear requests, or give commendationsin full captain's mast
Origin of mastMiddle English maste from Old English mæst, akin to German mast from Indo-European an unverified form mazdos, a pole, rod from source Classical Latin malus, mast ( from an unverified form madus with Sabine l for d), Irish maide, a stick
before the mast
Origin of mastquarters for common sailors were formerly located forward of the foremastArchaic as a common sailor or with the common sailors