Noun

1. Metal shackles; for hands or legs
2. A series of things depending on each other as if linked together
3. (chemistry) a series of linked atoms (generally in an organic molecule)
4. A series of (usually metal) rings or links fitted into one another to make a flexible ligament
5. (business) a number of similar establishments (stores or restaurants or banks or hotels or theaters) under one ownership
6. Anything that acts as a restraint
7. A unit of length
8. British biochemist (born in germany) who isolated and purified penicillin, which had been discovered in 1928 by sir alexander fleming (1906-1979)
9. A series of hills or mountains
10. A linked or connected series of objects
11. A necklace made by a stringing objects together

Verb

1. Connect or arrange into a chain by linking
2. Fasten or secure with chains