1.AdjectiveOf or pertaining to more than one chain.
"multichain polyamino acids"
2.AdjectiveOf 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.
"multichain Markov chain"
3.NounA multichain Markov chain.
4.NounAn ordered subset of a poset; a generalization of a chain that allows inequalities that are not strict.