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tidal bore

noun
1.
bore3 .

bore3

[bawr, bohr] /bɔr, boʊr/
noun
1.
an abrupt rise of tidal water moving rapidly inland from the mouth of an estuary.
Also called tidal bore.
Origin
1275-1325
1275-1325; Middle English bare < Old Norse bāra wave
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for tidal-bore

bore1

/bɔː/
verb
1.
to produce (a hole) in (a material) by use of a drill, auger, or other cutting tool
2.
to increase the diameter of (a hole), as by an internal turning operation on a lathe or similar machine
3.
(transitive) to produce (a hole in the ground, tunnel, mine shaft, etc) by digging, drilling, cutting, etc
4.
(intransitive) (informal) (of a horse or athlete in a race) to push other competitors, esp in order to try to get them out of the way
noun
5.
a hole or tunnel in the ground, esp one drilled in search of minerals, oil, etc
6.
  1. a circular hole in a material produced by drilling, turning, or drawing
  2. the diameter of such a hole
7.
  1. the hollow part of a tube or cylinder, esp of a gun barrel
  2. the diameter of such a hollow part; calibre
8.
(Austral) an artesian well
Word Origin
Old English borian; related to Old Norse bora, Old High German borōn to bore, Latin forāre to pierce, Greek pharos ploughing, phárunxpharynx

bore2

/bɔː/
verb
1.
(transitive) to tire or make weary by being dull, repetitious, or uninteresting
noun
2.
a dull, repetitious, or uninteresting person, activity, or state
Derived Forms
bored, adjective
Word Origin
C18: of unknown origin

bore3

/bɔː/
noun
1.
a high steep-fronted wave moving up a narrow estuary, caused by the tide
Word Origin
C17: from Old Norse bāra wave, billow

bore4

/bɔː/
verb
1.
the past tense of bear1

tidal bore

noun
1.
another term for bore3
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
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Word Origin and History for tidal-bore
bore
O.E. borian "to bore through, perforate," from bor "auger," from P.Gmc. *buron (cf. O.N. bora, Swed. borra, O.H.G. boron, M.Du. boren, Ger. bohren), from PIE base *bher- (2) "to cut with a sharp point" (cf. Gk. pharao "I plow," L. forare "to bore, pierce," O.C.S. barjo "to strike, fight," Albanian brime "hole"). The meaning "diameter of a tube" is first recorded 1570s; hence figurative slang full bore (1936) "at maximum speed," from notion of unchoked carburetor on an engine. Sense of "be tiresome or dull" first attested 1768, a vogue word c.1780-81 according to Grose; possibly a figurative extension of "to move forward slowly and persistently," as a boring tool does.
"The secret of being a bore is to tell everything." [Voltaire, "Sept Discours en Vers sur l'Homme," 1738]
bore
p.t. of bear (v.).
Online Etymology Dictionary, © 2010 Douglas Harper
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tidal-bore in Science
bore
  (bôr)   
  1. In fluid mechanics, a jump in the level of moving water, generally propagating in the opposite direction to the current. Strong ocean tides can cause bores to propagate up rivers.

    1. The white, shallow portion of a wave after it breaks. The bore carries ocean water onto the beach.

    2. A tidal wave caused by the surge of a flood tide upstream in a narrowing estuary or by colliding tidal currents.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for tidal-bore

tidal bore

body of water that, during exceptionally high sea tides, rushes up some rivers. Traveling upstream about two or three times as fast as the normal tidal current, a bore usually is characterized by a well-defined front of one or several waves, often breaking, followed by the bore's main body, which rises higher than the water level at its front. The height of the bore is greater near the banks of a river than at midstream. Because of momentum, some bores continue to move upstream for about one-half hour after high water. Not arising in estuaries, tidal bores are formed at a position a short distance upstream, where the river channel has become sufficiently narrow or shallow to concentrate the momentum of the rising tide. Bores occur at spring tides and at several tides preceding and following spring tides but never at neap tides. The formidable tidal bore that occurs on the lower Seine in France between Rouen and the sea is known as the Mascaret.

Learn more about tidal bore with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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