Wiktionary
n. (context medicine English) A surgical procedure for sterilization in which a woman's Fallopian tubes are blocked or severed.
WordNet
n. a sterilization procedure with women; both Fallopian tubes are tied in two places and the tubes removed in between the ligations
Wikipedia
Tubal ligation or tubectomy (also known as having one's "tubes tied") is a surgical procedure for sterilization in which a woman's fallopian tubes are clamped and blocked or severed and sealed, either of which prevents eggs from reaching the uterus for implantation. Tubal ligation is considered a permanent method of sterilization and birth control.
Usage examples of "tubal ligation".
I tried to concentrate on what Blanche was saying, but all I could think about was that even at my age, a tubal ligation probably wasn't out of the question.