yo
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yo
(yō)interj. Slang
1. Used as a greeting or to attract someone's attention.
2. Used to express emphasis: Today's my birthday, yo.
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.
yo
(jəʊ)sentence substitute
an expression used as a greeting, to attract someone's attention, etc
[C20: of unknown origin]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
yo
(yoʊ)interj.
(used as an exclamation to get someone's attention, express excitement, etc.)
[1375–1425]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.