concatenation

(noun) the state of being linked together as in a chain; union in a linked series.

(noun) the linking together of a consecutive series of symbols or events or ideas etc. Examples: "It was caused by an improbable concatenation of circumstances."

(noun) a series of things depending on each other as if linked together. Synonyms: chain. Examples: "The chain of command." "A complicated concatenation of circumstances."

(noun) the act of linking together as in a series or chain.