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

  

ultimate

 noun
noun
BrE BrE//ˈʌltɪmət//
 
; NAmE NAmE//ˈʌltɪmət//
 
 
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[singular] the ultimate in something (informal) the best, most advanced, greatest, etc. of its kind the ultimate in modern design Word Origin mid 17th cent.: from late Latin ultimatus, past participle of ultimare ‘come to an end’.
See the Oxford Advanced American Dictionary entry: ultimate