Definition of "Chain" :

noun: a series of (usually metal) rings or links fitted into one another to make a flexible ligament

noun: a necklace made by stringing objects together

noun: anything that acts as a restraint

noun: a linked or connected series of objects

"A chain of daisies."

noun: (business) a number of similar establishments (stores or restaurants or banks or hotels or theaters) under one ownership

noun: a series of things depending on each other as if linked together

"The chain of command."

noun: (chemistry) a series of linked atoms (generally in an organic molecule)

noun: a series of hills or mountains

noun: British biochemist (born in Germany) who isolated and purified penicillin, which had been discovered in 1928 by Sir Alexander Fleming (1906-1979)

noun: a unit of length

verb: fasten or secure with chains

"Chain the chairs together."

verb: connect or arrange into a chain by linking