The last in a series can be described as the ultimate. A cheeky kid, when asked what she wants to be when she grows up, might say, "I want to be an actress, a singer, and a veterinarian, but my ultimate goal is to be President of the United States."

A definition for the adjective ultimate is the furthest in space or time or the highest in degree or order. Traveling for business, you are flying first to London, then to Portugal, but your ultimate destination is South Africa. The kids ask you if they can invite friends over to play video games. It's a good idea to reply, "Mom isn't home from work yet and she's ultimate authority on the schedule."

Definitions of ultimate

adj 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”
representing a level of the highest possible achievement or attainment
expected to follow in the indefinite future from causes already operating
final, last, net
conclusive in a process or progression
of something done as a final recourse (especially to prevent a crisis or disaster)
final or last in your life or progress
closest in degree or order (space or time) especially in a chain of causes and effects
immediately before or after as in a chain of cause and effect
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adj 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”
coming after all others in time or space or degree or being the only one remaining

n the finest or most superior quality of its kind

“the ultimate in luxury”
Type of:
an essential and distinguishing attribute of something or someone

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