Dictionary

yo

interjection \ˈyō\

—used especially to attract someone's attention, as a greeting, or in response to a greeting

Full Definition of YO

—used especially to call attention, to indicate attentiveness, or to express affirmation
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Origin of YO

Middle English yo, io, interjection
First Known Use: 15th century

YO

abbreviation

Definition of YO

year old; years old

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