1 : the state of being connected
2 : a junction where two things (as paper or film or magnetic tape) have been joined together
3 : an act of joining or adjoining things
4 : junction by which parts or objects are joined together
5 : a connecting shape
6 : the act of bringing two things into contact (especially for communication)
7 : the property of sticking together (as of glue and wood) or the joining of surfaces of different composition