chain
n//ˈt͡ʃeɪn//kedja, kedja fast
A series of interconnected rings or links usually made of metal.
A series of stores or businesses with the same brand name.
(mathematics, set theory, order theory) A totally ordered set, especially a totally ordered subset of a poset.
(algebraic topology, originally) A formal sum of cells in a CW complex of a certain dimension k (in which case the formal sums are called k-chains); a formal sum of simplices or cubes of a certain dimension in a simplical complex or cubical complex (respectively).
(transitive) To fasten something with a chain.