Definition of fraternity noun from the Oxford Advanced American Dictionary

     

    fraternity

     noun
    noun
    NAmE//frəˈtərnət̮i//
     
    (pl. fraternities)
     
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  1. 1[countable] a group of people sharing the same profession, interests, or beliefs members of the medical/banking/racing, etc. fraternity
  2. 2(informal frat) [countable] a club for a group of male students at an American college or university compare sorority
  3. 3 [uncountable] (formal) a feeling of friendship and support that exists between the members of a group the ideals of liberty, equality, and fraternity
See the Oxford Advanced Learner's Dictionary entry: fraternity