1 final, last, terminating, terminal, end, eventual, conclusive, concluding, decisive, deciding:
The ultimate outcome will not be known till next week. Who is the ultimate authority in such matters?
2 final, maximum, highest, greatest, supreme, utmost, paramount:
Her ultimate goal is to win the gold medal.
3 elemental, basic, fundamental, underlying, primary, essential, final:
He believes that the ultimate truths were set down in Scripture.
4 remotest, furthest, farthest, extreme, uttermost, last, final:
The ultimate stage of the experiment will be at a distance of five light-years.