ˈt͡ʃeɪn kɑn.ˌkæt.ɪ.ˈneɪ.ʃən the act of linking together as in a series or chain a series of things depending on each other as if linked together the chain of command a complicated concatenation of circumstances the linking together of a consecutive series of symbols or events or ideas etc it was caused by an improbable concatenation of circumstances the state of being linked together as in a chain; union in a linked series