ultimate

Being the last or concluding element of a series.

“the ultimate sonata of that opus”

“a distinction between the verb and noun senses of `conflict' is that in the verb the stress is on the ultimate (or last) syllable”

Furthest or highest in degree or order; utmost or extreme.

“the ultimate achievement”

“the ultimate question”

The finest or most superior quality of its kind.

“the ultimate in luxury”