Definition of chain-smoke verb from the Oxford Advanced Learner's Dictionary

 

chain-smoke

 verb
verb
BrE
 
; NAmE
 
Verb Forms present simple I / you / we / they chain-smoke
BrE
 
; NAmE
 
he / she / it chain-smokes
BrE
 
; NAmE
 
past simple chain-smoked
BrE
 
; NAmE
 
past participle chain-smoked
BrE
 
; NAmE
 
-ing form chain-smoking
BrE
 
; NAmE
 
 
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[intransitive, transitive] chain-smoke (something) to smoke cigarettes continuously, lighting the next one from the one you have just smoked
See the Oxford Advanced American Dictionary entry: chain-smoke