Ultimate

<poem ultimate

  1. last; furthest or farthest; ending a process or series: the ultimate point in a journey; the ultimate style in hats. 
  2. maximum; decisive; conclusive: the ultimate authority; the ultimate weapon. 
  3. highest; not subsidiary: ultimate goal in life. 
  4. basic; fundamental; representing a limit beyond which further progress, as in investigation or analysis, is impossible: the ultimate particle; ultimate principles. 
  5. final; total: the ultimate consequences; the ultimate cost of a project.

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Source

dictionary.reference.com