greyhound

or gray·hound

[ grey-hound ]
/ ˈgreɪˌhaʊnd /

noun

one of a breed of tall, slender, short-haired dogs, noted for its keen sight and swiftness.
a swift ship, especially a fast ocean liner.

Origin of greyhound

before 1000; Middle English greihund, grehund, grihund, Old English grīghund < Old Norse greyhundr; compare Old Norse grey bitch; see hound1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for greyhound

greyhound
/ (ˈɡreɪˌhaʊnd) /

noun

a tall slender fast-moving dog of an ancient breed originally used for coursing
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