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

     

    fraternity

     noun
    noun
    BrE BrE//frəˈtɜːnəti//
     
    ; NAmE NAmE//frəˈtɜːrnəti//
     
    (pl. fraternities) University life, Friends
     
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  1. 1[countable + singular or plural verb] a group of people sharing the same profession, interests or beliefs members of the medical/banking/racing, etc. fraternity
  2. 2(also North American English, informal frat) [countable] a club for a group of male students at an American college or university compare sorority Culture Some fraternities also have female members. The members usually live in a house together and are called Greeks, because each fraternity takes as its name two or three Greek letters, such as Lambda Delta Chi. Fraternities do charity work but are sometimes criticized for their wild parties. see also Phi Beta Kappa See related entries: University life
  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 related entries: Friends
  4. Word Origin Middle English: from Old French fraternite, from Latin fraternitas, from fraternus, from frater ‘brother’.
See the Oxford Advanced American Dictionary entry: fraternity