linkage

noun
UK /ˈlɪŋkɪdʒ/
US /ˈlɪŋkɪdʒ/

A linkage is a connection that joins two things together.

The linkage between the two train cars keeps them moving together.


OTHER MEANINGS

2. A system of links or rods that passes movement from one part of a machine to another.

The bicycle's brake linkage needed oiling.

3. The act of joining groups or people together to work as a team.

The linkage of the two schools made a bigger sports league.

4. In genetics, the way certain genes tend to be passed on together.

Scientists studied the linkage of the genes for eye color.