multichain adjective 2noun 2forms 1 adjective2 •Of or pertaining to more than one chain. •Of a Markov chain, consisting of two or more closed sets of recurrent states plus (optionally) a set of states that do not belong to any of the closed sets. noun2 •A multichain Markov chain.A multichain with transient states is called a reducible multichain. — 2016 •An ordered subset of a poset; a generalization of a chain that allows inequalities that are not strict. formsmultichains