(n): a relation between things or events (as in the case of one causing the other or sharing features with it)
(n): (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)
(n): (genetics) attributes acquired via biological heredity from the parents
(n): a mechanical system of rods or springs or pivots that transmits power or motion
(n): a system of elements that interact on mechanical principles
(n): the act of linking things together
(n): the act of fastening things together
In most traditional cases, I'd agree. But the word has found use on the internet when referring to a large volume of hyperlinks. In this case, "linkage" refers to a measure of links rather than a single link.
I wonder if just "link" could work in its place...
What about "connection"?