say it: mast
mast is a noun meaning "a vertical spar for supporting sails". It is pronounced /ˈmæst/ — mast. It carries 4 recorded senses.
a vertical spar for supporting sails
nuts of forest trees (as beechnuts and acorns) accumulated on the ground
nuts of forest trees used as feed for swine
any sturdy upright pole
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for mast come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.