Notably, while most dictionaries have literally held the line on the definition, Google has added a meaning that is more Bidenesque:
literally
ˈlɪt(ə)rəli/Submit
adverb
in a literal manner or sense; exactly.
. . .
informal
used for emphasis while not being literally true.
“I have received literally thousands of letters”
Thus, we can assume Biden is using the Google meaning and has not literally (formal) met every world world but it literally (informal) feels that way.
Source: The Week
