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Definitions of brig:

noun: a penal institution (especially on board a ship)
noun: two-masted sailing vessel square-rigged on both masts

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Alternative Terms
brigantine house-of-correction jail keep penitentiary prison lockup pen big-house can clink cooler coop hoosegow joint jug pokey slammer stir calaboose free-unfree logarithmic-3 schooner lady-washington mediterranean-sea glossary-of-nautical-terms square-rig age-of-sail battle-of-lake-erie steamship sailing-rod-stewart-song mast-sailing fore-and-aft-rig gaff-rig mainsail topsail topgallant-sail royal-sail boom-sailing trysail yard studding-sail bowsprit staysail jib running-rigging standing-rigging ship battle-small-jpg uss-argus first-barbary-war war-of812 uss-oneida james-fenimore-cooper george-washington bully-hayes oliver-hazard-perry united-states-exploring-expedition pilgrim-brig boston california-cta-blue-line two-years-before-the-mast robert-jenkins-master-mariner war-of-jenkins-ear uss-reprisal776 american-revolution uss-somers842 mexican-american-war ghost-ship mary-celeste joseph-conrad william-henry-giles-kingston pirates-of-the-caribbean-the-curse-of-the-black-pearl star-trek-generations horatio-hornblower c-s-forester master-and-commander patrick-o-brian nathaniel-drinkwater richard-woodman iain-lawrence u-s-brig-niagara lady-nelson ts-royalist sloop-of-war snow-ship pacific-northwest rigging barca-longa barque bermuda-rig bilander caravel carrack catamaran clipper dutch-clipper cog-ship corvette cutter-ship