Definition of Phi Beta Kappa noun from the Oxford Advanced Learner's Dictionary

 

Phi Beta Kappa

 noun
noun
BrE
 
; NAmE
 
 
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(in the US) a society for college and university students who are very successful in their studies Culture Phi Beta Kappa is the most famous honor society for US college and university students in the arts and sciences. It is the oldest organization with Greek letters in the US, having been established in 1776 at the College of William and Mary in Virginia. Students with high academic grades can be chosen in their third or fourth years. Word Originfrom the initial letters of a Greek motto philosophia biou kubernētēs ‘philosophy is the guide to life’.
See the Oxford Advanced American Dictionary entry: Phi Beta Kappa