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sky-high

[skahy-hahy]
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adverb, adjective
  1. very high: Costs have gone sky-high since the war.
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Origin of sky-high

First recorded in 1810–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for sky-high

sky-high

adjective, adverb
  1. at or to an unprecedented or excessive levelprices rocketed sky-high
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adverb
  1. high into the air
  2. blow sky-high to destroy completely
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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