Closure of the vaginal vestibule by creating a fusion of the labia majora; typically done after excision of the labia minora and clitoris and incision of the labia majora to create raw surfaces that can be surgically joined by pinning so that they will eventually grow together; done for cultural, not medical, reasons.female circumcision. [L. infibulo, to pin or clasp together, to join surgically (Celsus), fr. in- + fibula, pin, clasp]