Noun

• S: (n) chain, concatenation (a series of things depending on each other as if linked together) "the chain of command"; "a complicated concatenation of circumstances"
• S: (n) chain, chemical chain ((chemistry) a series of linked atoms (generally in an organic molecule))
• S: (n) chain (a series of (usually metal) rings or links fitted into one another to make a flexible ligament)
• S: (n) chain ((business) a number of similar establishments (stores or restaurants or banks or hotels or theaters) under one ownership)
• S: (n) chain (anything that acts as a restraint)
• S: (n) chain (a unit of length)
• S: (n) Chain, Ernst Boris Chain, Sir Ernst Boris Chain (British biochemist (born in Germany) who isolated and purified penicillin, which had been discovered in 1928 by Sir Alexander Fleming (1906-1979))
• S: (n) range, mountain range, range of mountains, chain, mountain chain, chain of mountains (a series of hills or mountains) "the valley was between two ranges of hills"; "the plains lay just beyond the mountain range"
• S: (n) chain (a linked or connected series of objects) "a chain of daisies"
• S: (n) chain, string, strand (a necklace made by stringing objects together) "a string of beads"; "a strand of pearls"

Verb

• S: (v) chain (connect or arrange into a chain by linking)
• S: (v) chain (fasten or secure with chains) "Chain the chairs together"