1. (n.) The act of linking; the state of being linked; also, a system of links.

2. (n.) Manner of linking or of being linked; -- said of the union of atoms or radicals in the molecule.

3. (n.) A system of straight lines or bars, fastened together by joints, and having certain of their points fixed in a plane. It is used to describe straight lines and curves in the plane.

accord addition adjunct affairs affiliation affinity agglomeration agglutination aggregation alliance approximation articulation assemblage association bond bracketing closeness clustering combination communication concatenation concourse concurrence confluence congeries conglomeration conjugation conjunction connectedness connection contiguity contrariety convergence copulation coupling dealings deduction disjunction filiation gathering homology hookup intercommunication intercourse interlinking intimacy joinder joining jointure junction knotting liaison link linking marriage meeting merger merging mutual attraction nearness pairing propinquity proximity rapport relatedness relation relations relationship similarity splice symbiosis sympathy tie tie-in tie-up unification union yoking