tar UK /tɑː/US /tɑɹ/noun 9verb 3forms 3phrases 1 noun9 •A black, oil, sticky, viscous substance, consisting mainly of hydrocarbons derived from organic materials such as wood, peat, or coal. •Coal tar. •(often typeset "tar" in USA) A solid residual byproduct of tobacco smoke. •A program for archiving files, common on Unix systems. •A file produced by such a program. •Ellipsis of black tar heroin. •A Persian long-necked, waisted string instrument, shared by many cultures and countries in the Middle East and the Caucasus. •(slang, old-fashioned) A sailor (because of the traditional tarpaulin clothes).Shines in all climates like a star; In senates bold, and fierce in war; A land commander, and a tar. — 1723 •A single-headed round frame drum originating in North Africa and the Middle East. verb3 •To coat with tar. •To besmirch.The allegations tarred his name, even though he was found innocent. •To create a tar archive. formstarred · tarring · tars Phrases with tar tar outTo punish; to pay back or take revenge on.