\Ul"ti*ma\, a. [L., fem. ultimus last.]
Most remote; furthest; final; last.
{Ultima ratio} [L.], the last reason or argument; the last
   resort.
{Ultima Thule}. [L.] See {Thule}.

\Ul"ti*ma\, n. [L., fem. of ultimus last.] (Gram. &
Pros.)
The last syllable of a word.