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English definition of “tar”

tar

noun [U]     /tɑːr/ US  /tɑːr/
a black substance, sticky when hot, used especially for making roadsRoad surfaces and featuresBuilding materials one of the poisonous substances found in tobacco: a low tar cigaretteTobacco and smoking
(Definition of tar noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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