Definition of "Ligature" :

noun: the act of tying or binding things together

noun: something used to tie or bind

noun: thread used by surgeons to bind a vessel (as to constrict the flow of blood)

noun: a metal band used to attach a reed to the mouthpiece of a clarinet or saxophone

noun: character consisting of two or more letters combined into one

noun: (music) a group of notes connected by a slur