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A mooring rope or chain that secures the bow of a ship to a wharf.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Nautical Terms) a mooring rope at the bows of a ship
[C16: from head (in the sense: front) + fast a mooring rope, from Middle English fest, from Old Norse festr; related to fast1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014