mega

Multiple Entries:
  mega    mega-  

Concise Oxford English Dictionary © 2008 Oxford University Press:
mega /ˈmeɡə/ informal

▶adjective

• 1 very large.

• 2 excellent.

▶adverb extremely.

– origin 1980s: independent usage of mega-.

Concise Oxford English Dictionary © 2008 Oxford University Press:
mega-/ˈmeɡə-/

▶combining form

• 1 large: megalith.

• 2 denoting a factor of one million (10⁶): megahertz.

• 3 Computing denoting a factor of 2²⁰.

– origin from Gk megas ‘great’.