Abbreviation of ultimo (of last month).

The final (ultimate) syllable of a word or other utterance.

plural of ult

(archaic) Beyond the sea. / Of a brilliant dark blue or slightly purplish colour like that of the pigment (noun sense 1).

In full ultramarine blue: a brilliant blue pigment that was traditionally made from ground-up lapis lazuli, and now usually either extracted from mineral deposits or made synthetically.

Final; last in a series. / (of a syllable) Last in a word or other utterance. / Being the greatest possible; maximum; most extreme. / Being the most distant or extreme; farthest.

The most basic or fundamental of a set of things / The final or most distant point; the conclusion / The greatest extremity; the maximum

(transitive, archaic) To finish; to complete.

Very, extremely, or exceedingly high.

(archaic) revenge