Definition of ultimate adjective from the Oxford Advanced Learner's Dictionary

        

    ultimate

     adjective
    adjective
    BrE BrE//ˈʌltɪmət//
     
    ; NAmE NAmE//ˈʌltɪmət//
     
    [only before noun]
     
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  1. 1  happening at the end of a long process synonym final our ultimate goal/aim/objective/target We will accept ultimate responsibility for whatever happens. The ultimate decision lies with the parents.
  2. 2  most extreme; best, worst, greatest, most important, etc. This race will be the ultimate test of your skill. Silk sheets are the ultimate luxury. Nuclear weapons are the ultimate deterrent.
  3. 3from which something originally comes synonym basic, fundamental the ultimate truths of philosophy and science We could not trace the ultimate source of the rumours.
  4. Word Origin mid 17th cent.: from late Latin ultimatus, past participle of ultimare ‘come to an end’.Extra examples The ultimate fate of the captured troops is unknown. War is the ultimate failure of public communication. our ultimate goal/​aim/​objective/​target
See the Oxford Advanced American Dictionary entry: ultimate