Tar is a dark, thick and sticky liquid with a sharp smell.(noun)
An example of tar is what is normally used to fill cracks in roads.
See tar in Webster's New World College Dictionary
Origin: ME terre < OE teru < PGmc *terw(i)a-, substance from trees < IE base *deru-, tree
Origin: < tar(paulin)
See tar in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old English teru; see deru- in Indo-European roots.
Origin: Possibly short for tarpaulin.
Learn more about tar