reef knot

noun Nautical.

a square knot used in reefing sails.

Origin of reef knot

First recorded in 1835–45

Also called flat knot.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for reef knot

Historical Examples of reef knot

A squeeze of hands, with lingers entwined, tight as a reef-knot—then relaxed with reluctance—after which they separate.
The Flag of Distress
Mayne Reid
This is a term of derision when a reef-knot is crossed the wrong way, so as to be insecure.
The Sailor's Word-Book
William Henry Smyth
In large vessels it is usual to pass a ligature round the vessel and tie it with a reef-knot.
Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7
Various
"Never knew a reef-knot to slip like that before," exclaimed Billy, regarding the trailing traces.
Billy Barcroft, R.N.A.S.
Percy F. Westerman

British Dictionary definitions for reef knot

reef knot

noun

a knot consisting of two overhand knots turned opposite waysAlso called: square knot

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012