Usually means: Achieving maximum output with minimum.
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We found 3 dictionaries that define the word ultraefficient:

General (3 matching dictionaries)
  1. ultraefficient: Merriam-Webster
  2. ultraefficient: Collins English Dictionary
  3. ultraefficient: Wiktionary

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Definitions from Wiktionary (ultraefficient)

▸ adjective:  Extremely efficient; of utmost efficiency.

Similar:
ultraquick, hyperefficient, ultraintelligent, superefficient, ultraconcentrated, ultraintense, ultraingenious, ultraintensive, ultraenergetic, ultrahard, more...

Opposite:
inefficient, ineffective, inept, unproductive, unsuccessful

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Similar:
ultraquick, hyperefficient, ultraintelligent, superefficient, ultraconcentrated, ultraintense, ultraingenious, ultraintensive, ultraenergetic, ultrahard, more...

Opposite:
inefficient, ineffective, inept, unproductive, unsuccessful



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