chainchain1  /tʃeɪn/  ●●● noun 
1
 [countable, uncountable] a series of metal rings connected together: 
 She wore a delicate gold chain around her neck.
 a bicycle chain  (=that makes the wheels turn)2[countable] a group of stores, hotels, etc. that is owned by the same person or company: 
 a chain of restaurants
 a hotel chain3chain of events a series of related events or actions: 
 A complicated chain of events led to World War I.4[countable] a series of similar things in a line: 
 a mountain chain
 a chain of islands5in chains prisoners in chains have heavy chains fastened around their legs or arms, to prevent them from escaping [Origin: 1200–1300 Old French chaeine, from  Latin catena]
                                            
                                        
