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

     

    legion

     noun
    noun
    BrE BrE//ˈliːdʒən//
     
    ; NAmE NAmE//ˈliːdʒən//
     
     
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  1. 1a large group of soldiers that forms part of an army, especially the one that existed in ancient Rome the French Foreign Legion Caesar’s legions
  2. 2(formal) a large number of people of one particular type legions of photographers
  3. Word Origin Middle English: via Old French from Latin legio(n-), from legere ‘choose, levy’. The adjective dates from the late 17th cent., in early use often in the phrase my, their, etc. name is legion, i.e. ‘we, they, etc. are many’ (Mark 5:9) in the Bible.
See the Oxford Advanced American Dictionary entry: legion