• 1. Square or Reef Knot
    1. Square or Reef Knot
  • WordNet 3.6
    • v reef reduce (a sail) by taking in a reef
    • v reef roll up (a portion of a sail) in order to reduce its area
    • v reef lower and bring partially inboard "reef the sailboat's mast"
    • n reef one of several strips across a sail that can be taken in or rolled up to lessen the area of the sail that is exposed to the wind
    • n Reef a rocky region in the southern Transvaal in northeastern South Africa; contains rich gold deposits and coal and manganese
    • n reef a submerged ridge of rock or coral near the surface of the water
    • ***

Additional illustrations & photos:


Webster's Revised Unabridged Dictionary
  • Interesting fact: The largest coral reef in the world is the Great Barrier Reef located in Australia. The reef is approximately 2023 kilometers long
    • Reef A chain or range of rocks lying at or near the surface of the water. See Coral reefs, under Coral.
    • Reef (Mining) A large vein of auriferous quartz; -- so called in Australia. Hence, any body of rock yielding valuable ore.
    • n Reef (Naut) That part of a sail which is taken in or let out by means of the reef points, in order to adapt the size of the sail to the force of the wind.☞ From the head to the first reef-band, in square sails, is termed the first reef; from this to the next is the second reef; and so on. In fore-and-aft sails, which reef on the foot, the first reef is the lowest part.
    • v. t Reef (Naut) To reduce the extent of (as a sail) by rolling or folding a certain portion of it and making it fast to the yard or spar.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: In Texas any artificial constructed underwater barrier reefs must come with an instruction booklet.
    • n reef A low, narrow ridge of rocks, rising ordinarily but a few feet above the water. A reef passes by increase of size into an island. The word is especially used with reference to those low islands which are formed of coralline debris. See atoll, and coral reef, below.
    • n reef Any extensive elevation of the bottom of the sea; a shoal; abank: so called by fishermen.
    • n reef In Australia, the same as lode, vein, or ledge of the Cordilleran miner: as, a quartz-reef (that is, a quartz-vein).
    • n reef A kind of commercial sponge which grows on reefs.
    • n reef Nautical, a part of a sail rolled or folded up, in order to diminish the extent of canvas exposed to the wind. In topsails and courses, and sometimes in top-gallantsails, the reef is the part of the sail between the head and the first reef-band, or between any two reef-bands; in fore-and-aft sails reefs are taken on the foot. There are generally three or four reefs in topsails, and one or two in courses.
    • reef Nautical, to take a reef or reefs in; reduce the size of (a sail) by rolling or folding up a part and securing it by tying reef-points about it. In square sails the reef-points are tied round the yard as well as the sail; in fore-and-aft sails they may or may not be tied round the boom Which extends the foot of the sail. In very large ships, where the yards are so large as to make it inconvenient to tie the reef-points around them, the sails are sometimes reefed to jackstays on the yards.
    • reef To gather up stuff of any kind in away similar to that described in def. 1. Compare reefing.
    • reef See the quotation.
    • reef Scabby; scurvy.
    • n reef The itch; also, any eruptive disorder.
    • n reef Dandruff.
    • n reef In the Tyrolese Alps, and especially in the region of the dolomites, “massive un-stratified limestones and dolomites rising amid strikingly contrasted sediments.”
    • reef In Australian mining, to work at a reef.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: The Santa Maria was the only one of Columbus's ships not to return to Spain. It hit a reef on December 5, 1492 and sank.
    • n Reef rēf a chain of rocks lying at or near the surface of the water: a shoal or elevated bank: a lode, vein, or ledge, in Australian mining phraseology.
    • n Reef rēf a portion of a sail rolled or folded up
    • v.t Reef to reduce the exposed surface of, as a sail: to gather up any material in a similar way
    • adj Reef rēf (Scot.) scabby
    • n Reef the itch
    • ***


Webster's Revised Unabridged Dictionary
Akin to D. rif, G. riff, Icel. rif, Dan. rev,; cf. Icel. rifa, rift, rent, fissure, rifa, to rive, bear. Cf. Rift Rive


In literature:

It was, however, not the reefs that drew their attention.
"The Enchanted Island" by Fannie Louise Apjohn
Before noon we saw more breakers, the reef of which was composed of very large stones, and called it Stony-reef Island.
"Voyage of H.M.S. Pandora" by Edward Edwards
She, yer mother, was powerful 'fraid ye might wreck yerself on the same kind o' reef what she struck.
"Janet of the Dunes" by Harriet T. Comstock
All hands were now employed in reefing the topsails, for the masts bent like willow wands.
"The Rival Crusoes" by W.H.G. Kingston
She might have been cast on some of the numerous reefs which lay thereabouts, or have been driven far away from the island.
"The Voyage of the "Steadfast"" by W.H.G. Kingston
Many years later, in 1826, the wreck of his two ships was found on the reefs of an island near the New Hebrides.
"A Book of Discovery" by Margaret Bertha (M. B.) Synge
But until they rounded the promontory and entered the narrow inlet to Reef Harbor the town and the summer colony was entirely invisible.
"Ruth Fielding Down East" by Alice B. Emerson
She cast to the north, and stood directly towards the reef of rocks which appeared ahead.
"The Heir of Kilfinnan" by W.H.G. Kingston
As yet no object broke the surface of the mirror-like bay within the reef.
"Gascoyne, the Sandal-Wood Trader" by R.M. Ballantyne
There, have the reefs shaken out of that mainsail, and send the cutter along.
"In the King's Name" by George Manville Fenn

In poetry:

The sea sings to me of you
Loud on the reef;
Always it moans as it sings,
Voicing my grief.
"Lyrics Of Love And Sorrow" by Paul Laurence Dunbar
For when she came to spike and spine,
Where reef and river gather,
Her feet were sore with shell and chine;
She could not travel farther.
"Syrinx" by Henry Kendall
Such was the wreck of the Hesperus,
In the midnight and the snow!
Christ save us all from a death like this,
On the reef of Norman's Woe!
"The Wreck Of The Hesperus" by Henry Wadsworth Longfellow
"'Twas in the good ship NANCY BELL
That we sailed to the Indian Sea,
And there on a reef we come to grief,
Which has often occurred to me.
"The Yarn of the Nancy Bell" by William Schwenck Gilbert
He is the King of Reef, I'll declare, I'll declare,
He is the King of Reef, I'll declare,
He is the King of Reef,
Of a Robber and o' Thief,
To rest void of Relief when he's near.
"You Jacobites" by Anonymous British
Dear friends, who are listening so sweetly the while,
With your lips double--reefed in a snug little smile,
I leave you two fables, both drawn from the deep,--
The shells you can drop, but the pearls you may keep.
"Verses For After-Dinner" by Oliver Wendell Holmes

In news:

Funding is available to help West Side landowners implement land-based conservation practices through the West Maui Coral Reef Initiative.
El Niño killing young coral reef fish, biologists find.
Study says reef ecosystems contain unique and old lineages of corals only found in region.
Reef Ecosystems in Indian Ocean are One of a Kind.
Biologist fights to restore coral reefs .
IT'S past time to tell the truth about the state of the world's coral reefs , the nurseries of tropical coastal fish stocks.
A World Without Coral Reefs .
Complexity of Coral Reefs .
Coral Reefs by Jason Chin.
See where in the world you can go for hot diving spots and see pictures from the reefs.
Deep Underwater, Oil Threatens Reefs.
According to government scientists, some 27 percent of the world's reefs are already gone.
Reef stability is essential to the balance of marine ecosystems CopyrightR Graham.
Global warming and overfishing are killing reefs while scientists struggle to save them.
Near Miss by Hurricane Can Bring a Big Chill to Overheated Coral Reefs .

In science:

Suppose we have the semantic structure that corresponds to the noun phrase a magenta Capri, and suppose we have gone as far as to generate the semantic content that could be ultimately realised as the noun phrase a reef-green Capri.
Generating One-Anaphoric Expressions: Where Does the Decision Lie?
As far as anyone knew, we were gathered at the resplendent Dunk Island on the Barrier Reef to celebrate Ken Freeman’s 60th birthday.
Workshop Summary: The Dynamics, Structure and History of Galaxies
Allelopathy and spatial competition among coral reef invertebrates.
Stochastic evolutionary game dynamics
Recall (see [Fox62]) that the reef and granny knots have isomorphic groups.
A Second Order Algebraic Knot Concordance Group
However the reef knot is the trefoil connect summed with the reverse of its obverse, and so is slice.
A Second Order Algebraic Knot Concordance Group