Webster's Revised Unabridged Dictionary · 1913

Ultima

Ultima (ul"ii*mȧ) , adjective

[Latin, fem. of ultimus last.]

Most remote; furthest; final; last.
Collocations (2)
Ultima ratio , the last reason or argument; the last resort.
Ultima Thule , See Thule.

Ultima , noun

[Latin, fem. of ultimus last.]

(Grammar & Prosody) The last syllable of a word.