A series of interconnected rings or links usually made of metal. • An accessory, adornment or insignia comprising, containing or depicting a series of links. • A livery collar, a chain of office. • That which confines, fetters, or secures; a bond. • A snow chain. • A bicycle chain. • A pair of sticks connected by a ten yard chain, used to measure a down in American football. • A watchchain. • A keychain. • A necklace of chain jewelry, usually gold. • A door chain. • A series of interconnected links of known length, used as a measuring device. • A long measuring tape. • A unit of length, exactly equal to 22 yards, which is 4 rods or 100 links, and approximately equal to 20.12 metres; the length of a Gunter's surveying chain; the length of a cricket pitch. • Iron links bolted to the side of a vessel to bold the dead-eyes connected with the shrouds; also, the channels. • A lightning bolt. • A series of interconnected things. • An unbroken streak. • A series of stores or businesses with the same brand name; a series of such stores as opposed to a small, independent shop. • A chain of command. • The sequence of processes and transactions that result in a product or commodity being available. • The warp threads of a web. • A sequence of linked house purchases, each of which is dependent on the preceding and succeeding purchase (said to be "broken" if a buyer or seller pulls out). • A blockchain. • A kinetic chain. • A number of atoms in a series, which combine to form a molecule. • A totally ordered set, especially a totally ordered subset of a poset. • 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). • An element of a group (or module) in a chain complex.