last word noun4 •A concluding remark; final advice, instructions, or observation.[W]hen we had grasped hands for the last time and had said our last good-bye, he added this one more last word: "Of all the people I have ever known you are the only one I don't know." — 1918 •A final decision or remark, or the right to make one.have the last word •[in the plural] The final statement uttered by a person before death.Benjamin Franklin [...] pondered over his last words for as much as two weeks, and then when the time came, he said, "None but the brave deserve the fair," and died happy. — 1889 •The finest, highest, or ultimate representative of some class of objects.Little Joe's mother's cake was the last word in cakes; [...] — 1917 formslast words