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Meaning of boxhaul

box•haul

Pronunciation: (boks'hôl"), [key]
— v.t. Naut.
  1. to put (a square-rigged sailing vessel) on a new tack by bracing the head yards aback and backing onto the new heading.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.