tar
A black, oil, sticky, viscous substance, consisting mainly of hydrocarbons derived from organic materials such as wood, peat, or coal.
Other meanings
often typeset "tar" in USA A solid residual byproduct of tobacco smoke.
A sailor (because of the traditional tarpaulin clothes).
Word history
From Old English "teoru".
Where this comes from
This definition is adapted from “tar” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.