Maybe someday we'll be using a different form a communication instead of the WORD.
Also, many slang words and other curses and such at posted at this very site.
"Word?" ("You speak the truth?")
"Word." ("I speak the truth.")
"Word" has no single meaning, but is used to convey a casual sense of affirmation, acknowledgement, agreement, or to indicate that something has impressed you favorably.
Its usage among young blacks has been parodied ad nauseam among clueless suburban whites.