the last word

EACH OF US WANTS TO "HAVE" IT -
BUT CAN'T BE IN SOLITUDE.
OUR MEMORIES TEND TO FAVOUR IT,
AND IT'S HALLOWED IN A FEUD.

BUT IT'S ONLY RETAINED WHEN
IT'S SENT, LIKE SOMETHING SPOKEN.
IT'S NOT "WORD" ALONE FOR THEN
IT'S "THIRD PLACE" WOULD BE TOKEN.

ALSO ADD TO THAT "THE LAST",
BUT IT MIGHT HAVE BEEN HEARD FIRST.
SINCE IT APPEARS TO STICK FAST,
IT DAIN'T APPEAR TO BE WORST!

What is this thing?