v. Somewhat rare. [f. L. soror sister + -IZE, after fraternize.] intr. To associate with a person or persons as a sister or sisters; to form a sisterly friendship.
1875. Temple Bar, March, 533. If there be a baby attached to either party, a general sororising is as inevitable as death.
a. 1876. M. Collins, Th. in Garden (1880), II. i. 3. The beautiful girls … sororising with the rustic maidenhood of their parishes.
