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

 

sorority

 noun
noun
BrE BrE//səˈrɒrəti//
 
; NAmE NAmE//ˈrɔːrəti//
 
, NAmE//ˈrɑːrəti//
 
(pl. sororities)(North American English) University life
 
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a club for a group of women students at an American college or university compare fraternity See related entries: University life Culture Members often live together in a sorority house. They are called ‘Greeks’, because each sorority's name consists of two or three Greek letters, such as Chi Omega or Kappa Kappa Gamma. They also help charities and do community work. A few student sororities are academic or professional organizations. compare fraternity Word Origin mid 16th cent.: from medieval Latin sororitas, or from Latin soror ‘sister’ (on the pattern of fraternity).
See the Oxford Advanced American Dictionary entry: sorority