Home › Words › Q › quitlinequitlinequitline · noun — A helpline offering advanced treatment for addiction and behavior change.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom quit + line.nounA helpline offering advanced treatment for addiction and behavior change.e.g.“Have you thought about calling the smoking quitline?”Definitions & examples from Wiktionary (CC BY-SA 3.0).