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

 

phalanx

 noun
noun
BrE BrE//ˈfælæŋks//
 
; NAmE NAmE//ˈfælæŋks//
 
(formal)
 
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a group of people or things standing very close together The protesters ran into a solid phalanx of riot police. Word Origin mid 16th cent. (denoting a body of Macedonian infantry): via Latin from Greek.
See the Oxford Advanced American Dictionary entry: phalanx