Definition of know from
: to know anything about or care at all about (someone or something) —used in negative statements <kids who don't know from sports>
Word by Word Definitions
: to perceive directly : have direct cognition of
: to have understanding of
: to recognize the nature of : discern
Seen and Heard
What made you want to look up know from? Please tell us where you read or heard it (including the quote, if possible).