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southwest

[south-west; Nautical sou-west]
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noun
  1. the point or direction midway between south and west. Abbreviation: SW
  2. a region in this direction.
  3. the Southwest, the southwest region of the United States.
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adjective
  1. lying toward, situated in, or directed toward the southwest.
  2. coming from the southwest, as a wind.
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adverb
  1. in the direction midway between south and west.
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Origin of southwest

before 900; Middle English; Old English sūthwest. See south, west
Related formssouth·west·ern, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for southwestern

southwest

noun
  1. the point of the compass or the direction midway between west and south, 225° clockwise from north
  2. (often cap usually preceded by the) any area lying in or towards this direction
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adjective Also: southwestern
  1. (sometimes capital) of or denoting the southwestern part of a specified country, area, etcsouthwest Italy
  2. situated in or towards the southwest
  3. (esp of the wind) from the southwest
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adverb
  1. in, to, towards, or (esp of the wind) from the southwest
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Symbol: SW
Derived Formssouthwesternmost, adjective

Southwest

noun
  1. the Southwest the southwestern part of Britain, esp Cornwall, Devon, and Somerset
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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

Word Origin and History for southwestern

adj.

Old English suðwesterne; see southwest + -ern. In reference to a section of the U.S., from 1806, when it meant "Mississippi and Alabama."

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southwest

adv.

Old English suð-west; see south + west. As a noun from early 12c. Related: Southwester; southwesterly.

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Online Etymology Dictionary, © 2010 Douglas Harper