Определение fraternity and sorority в Английский Язык Английский Язык словарь
Social, professional, or honorary societies for males and females, respectively. Most such organizations use combinations of letters of the Greek alphabet as names. Many social organizations at U.S. colleges and universities are residential and require new members ("pledges") to partake in initiation rites. Certain honorary societies, such as Phi Beta Kappa, are also called fraternities; membership is based on general undergraduate scholarship. See also secret society