guirogui·ro (gw??r?, gwîr??)n. pl. gui·ros A Latin American percussion instrument made of a hollow gourd with a grooved or serrated surface, played by scraping with a stick or rod.[American Spanish güiro, from Taíno.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.guiro (??wi?r??) n, pl -ros (Instruments) a Latin American percussion instrument made from a hollow gourd that produces a rasping sound when rubbedCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014gui?ro (?gw??r o?, ?g??r o?) n., pl. -ros. a South American musical instrument consisting of a hollow gourd with a serrated surface that is scraped with a stick. [1895?1900;