know the meaning of (something)
idiomDefinition of know the meaning of (something)
: to understand (something) because one has experienced it
I know the meaning of loneliness.
—often used in negative statements Those people don't know the meaning of hard work. —often used in an exaggerated way to make a forceful statement He doesn't know the meaning of fear.I'll never stop trying. I don't know the meaning of the word "failure."