Definition of mega- combining form from the Oxford Advanced Learner's Dictionary



     combining form
    combining form
    BrE BrE//ˈmeɡə//
    ; NAmE NAmE//ˈmeɡə//
    (in nouns)
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  1. 1very large or great a megastore
  2. 2(in units of measurement) one million a megawatt
  3. 3(in units of measurement) 220, or 1 048 576
  4. Word Originfrom Greek megas ‘great’.

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