linkage

n. act of linking; connecting, joining, coupling, binding

Linkage generally means "the manner or style of being united", and can refer to:Genetic linkageLinkage (mechanical)Linkage (policy)Linkage (linguistics)Linkage (software)Linkage is also a commonly used phrase in most instant message programs used to request a URL or hyperlink to a web location, particularly a hyperlink to a photo of a person, particularly on a social website such as facebook or myspace. It is used on some websites in place of a "link to us" (or similar) text.Also see webpage and web browser
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Noun
1. an associative relation
(hypernym) connection, connexion, connectedness
(hyponym) link, nexus
(derivation) associate, tie in, relate, link, colligate, link up, connect
2. (genetics) traits that tend to be inherited together as a consequence of an association between their genes; all of the genes of a given chromosome are linked (where one goes they all go)
(synonym) gene linkage
(hypernym) inheritance, hereditary pattern
(classification) genetics, genetic science
3. a mechanical system of rods or springs or pivots that transmits power or motion
(hypernym) mechanical system
(derivation) connect, link, link up, join, unite
4. the act of linking things together
(hypernym) fastening, attachment
(derivation) connect, link, tie, link up

n. linkage, connecting, joining

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

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

(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.