The noun chain has 9 senses (first 5 from tagged texts)
1. (14) chain, concatenation -- (a series of things depending on each other as if linked together; "the chain of command"; "a complicated concatenation of circumstances")
2. (3) chain, chemical chain -- ((chemistry) a series of linked atoms (generally in an organic molecule))
3. (2) chain -- (a series of (usually metal) rings or links fitted into one another to make a flexible ligament)
4. (1) chain -- (a number of similar establishments (stores or restaurants or banks or hotels or theaters) under one ownership)
5. (1) chain -- (anything that acts as a restraint)
6. chain -- (a unit of length)
7. 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))
8. 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. chain, string, strand -- (a necklace made by a stringing objects together; "a string of beads"; "a strand of pearls";)
Overview of verb chain
The verb chain has 2 senses (no senses from tagged texts)
1. chain -- (connect or arrange into a chain by linking)
2. chain -- (fasten or secure with chains; "Chain the chairs together")