noun
1. : the final remark in a controversy or other verbal exchange
always manages to get in the last word
2.
a. : power, right, or act of final decision : final judgment or say
the last word lies with Asia and Africa — A.J.Toynbee
under our proposal the civilians have the last word in everything — A.H.Vandenberg †1951
b. : authoritative statement or treatment : definite work
surely be the last word on the subject for many years
3. : one that is the most advanced, up-to-date, or currently fashionable exemplar of its kind : acme
a character who was the last word in exquisite vice — Daniel George
the last word in fireproof construction — G.F.T.Ryall
absolutely the last word in schools — Newsweek