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