noun

 

metal rings a line of metal rings connected together

a bicycle chain

 

business a number of similar shops, restaurants, etc owned by the same company

a chain of hotels/supermarkets

 

events a series of things that happen one after the other

His arrival set off a surprising chain of events.

 

verb

 

to fasten someone or something to someone or something else using a chain

I chained my bike to a lamppost.