1. (noun)chain, concatenation a series of things depending on each other as if linked together "the chain of command"; "a complicated concatenation of circumstances"
2. (noun)chain, chemical chain (chemistry) a series of linked atoms (generally in an organic molecule)
7. (noun)Chain, Ernst Boris Chain, Sir Ernst Boris Chain Britishbiochemist (born in Germany) who isolated and purified penicillin, which had been discovered in 1928 by Sir AlexanderFleming (1906-1979)
8. (noun)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"
9. (noun)chain a linked or connected series of objects "a chain of daisies"
10. (noun)chain, string, strand a necklace made by a stringing objects together "a string of beads"; "a strand of pearls";
11. (verb)chain connect or arrange into a chain by linking
12. (verb)chain fasten or secure with chains "Chain the chairs together"