1. a. A connected, flexible series of links, typically of metal, used especially for holding objects together or restraining or for transmitting mechanical power. b. Such a set of links, often of precious metal and with pendants attached, worn as an ornament or symbol of office.

2. A restraining or confining agent or force.

3. chains a. Bonds, fetters, or shackles. b. Captivity or oppression; bondage: threw off the chains of slavery.

4. A series of closely linked or connected things: a chain of coincidences. See synonyms at series.

5. A number of establishments, such as stores, theaters, or hotels, under common ownership or management.

6. A range of mountains.

7. Chemistry. A group of atoms bonded in a spatial configuration like links in a chain.

8. a. An instrument used in surveying, consisting of 100 linked pieces of iron or steel and measuring 66 feet (20.1 meters). Also called Gunter's chain. b. A similar instrument used in engineering, measuring 100 feet (30.5 meters). c. Abbr. ch A unit of measurement equal to the length of either of these instruments.

1. To bind or make fast with a chain or chains: chained the dog to a tree.

2. To restrain or confine as if with chains: workers who were chained to a life of dull routine.