so ‧ ror ‧ i ‧ ty /səˈrɒrəti, səˈrɒrɪti $ səˈrɔː-/ BrE AmE noun ( plural sororities ) [countable]
[ Date: 1500-1600 ; Language: Medieval Latin ; Origin: sororitas , from Latin soror 'sister' ]
a club for women students at some American colleges and universities ⇨ fraternity