ultimate

nouns

the finest or most superior quality of its kind
"the ultimate in luxury"
is a type of (narrower)
an essential and distinguishing attribute of something or someone
"the quality of mercy is not strained"--Shakespeare

adjectives

furthest or highest in degree or order; utmost or extreme
"the ultimate achievement"; "the ultimate question"; "man's ultimate destiny"; "the ultimate insult"; "one's ultimate goal in life"
is derived from
antonym
is similar to
representing a level of the highest possible achievement or attainment
"the crowning accomplishment of his career"
is similar to
expected to follow in the indefinite future from causes already operating
"hope of eventual (or ultimate) rescue"; "if this trend continues it is not reasonable to expect the eventual collapse of the stock market"
is similar to
conclusive in a process or progression
"the final answer"; "a last resort"; "the net result"
is similar to
of something done as a final recourse (especially to prevent a crisis or disaster)
"a last-ditch attempt"
is similar to
final or last in your life or progress
"the supreme sacrifice"; "the supreme judgment"
is an attribute of
the state or degree of being ultimate; the final or most extreme in degree or size or time or distance, "the ultimacy of these social values"
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"
is derived from
is similar to
coming after all others in time or space or degree or being the only one remaining
"the last time I saw Paris"; "the last day of the month"; "had the last word"; "waited until the last minute"; "he raised his voice in a last supreme call"; "the last game of the season"; "down to his last nickel"