Top Definition
a) (original meaning) : among winter time lobster and crab fishermen in North America: on a vessel, to close all entrances to the lower decks and crew cabins when you are in a storm

b) (my new and improved meaning): in Atlantic Canada and New England and in cities such as New York, Boston, Montreal, Halifax, to insulate the doors and windows of one's house for the winter months.
to batten the hatches definition b), even if it costs a small fortune, is a snow-brainer if you live in Canada or The northeastern United States
by Sexydimma March 07, 2015

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