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Related to reef: billabong
1. A strip or ridge of rocks, sand, or coral that rises to or near the surface of a body of water.
2. A vein of ore.
3. Chiefly Western US A long craggy ridge or rocky escarpment.
[Obsolete Dutch rif, possibly from Old Norse, ridge.]
reef 2(rēf) Nautical
A portion of a sail gathered in and secured to lessen the area exposed to the wind.
tr.v. reefed, reef·ing, reefs
1. To reduce the size of (a sail) by gathering in a part and securing it, as by lashing it to a yard.
2. To shorten (a topmast or bowsprit) by taking part of it in.
[Partly from Middle English rif (from Old Norse rif, from rīfa, to rive) and partly from Dutch and Low German reef (Low German, from Dutch), back-formation from Dutch reven, pl. of rif, reef (of a sail), from or akin to Old Norse rif.]
1. (Geological Science) a ridge of rock, sand, coral, etc, the top of which lies close to the surface of the sea
2. (Geological Science) a ridge- or mound-like structure built by sedentary calcareous organisms (esp corals) and consisting mainly of their remains
3. (Mining & Quarrying) a vein of ore, esp one of gold-bearing quartz
[C16: from Middle Dutch ref, from Old Norse rif rib1, reef2]
(Nautical Terms) the part gathered in when sail area is reduced, as in a high wind
1. (Nautical Terms) to reduce the area of (sail) by taking in a reef
2. (Nautical Terms) (tr) to shorten or bring inboard (a spar)
[C14: from Middle Dutch rif; related to Old Norse rif reef, rib1, German reffen to reef; see reef1]
1. a ridge of rocks or sand, often of coral debris, at or near the surface of the water.
2. Mining. a lode or vein.
[1575–85; earlier riff(e) < Dutch rif]
1. a part of a sail that is rolled and tied down to reduce the area exposed to the wind.v.t.
2. to shorten (a sail) by tying in one or more reefs.
3. to reduce the length of (a topmast, a bowsprit, etc.).
[1350–1400; Middle English refe (n.) < Dutch reef]
An irregular mass of rock or coral that rises up to or near the surface of a body of water. See more at coral reef.
reef- From Old Norse rif, "rib."
See also related terms for rib.
Past participle: reefed
A ridge of rocks or coral that is usually submerged in the sea.
Switch to new thesaurus
|Noun||1.||reef - a submerged ridge of rock or coral near the surface of the water|
coral reef - a reef consisting of coral consolidated into limestone
ridge - a long narrow natural elevation or striation
|2.||Reef - a rocky region in the southern Transvaal in northeastern South Africa; contains rich gold deposits and coal and manganese|
Transvaal - a province of northeastern South Africa originally inhabited by Africans who spoke Bantu; colonized by the Boers
|3.||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|
sail, canvass, canvas, sheet - a large piece of fabric (usually canvas fabric) by means of which wind is used to propel a sailing vessel
|Verb||1.||reef - lower and bring partially inboard; "reef the sailboat's mast"|
|2.||reef - roll up (a portion of a sail) in order to reduce its area|
|3.||reef - reduce (a sail) by taking in a reef|
سِلْسِلَة صُخور فَوْق سَطْح الماء
a line of rocks etc just above or below the surface of the sea. The ship got stuck on a reef. rif سِلْسِلَة صُخور فَوْق سَطْح الماء риф recife útes, rif das Riff rev ύφαλοςarrecife kari تپه دریایی؛ صخره دریایی riutta récifשונית समुद्री चट्टान, शैलभिति greben zátony karang rif scogliera 岩礁 초(礁), 사초, 모래톱 rifas rifs batu karang rifrev, skjærrafa ګاره، پرښه، كاړ، دسيند په غاړه دشګواوكاڼو ډبرى recife recif риф útes čer greben rev แนวหินโสโครก sığ kayalık, resif 暗礁 риф, підводна скеля پتھریلا ساحل đá ngầm 暗礁