Real Dictionary

tar
uncountable noun: Tar is a thick black sticky substance that is used especially for making roads.

tar in American English 1
a thick, sticky, brown to black liquid with a pungent odor, obtained by the destructive distillation of wood, coal, peat, shale, etc.: tars are composed of hydrocarbons and their derivatives, and are used for protecting and preserving surfaces, in making
of or like tar
to cover or smear with or as with tar
noun: any of various dark-colored viscid products obtained by the destructive distillation of certain organic substances, as coal or wood

tar in American English 2
noun: a sailor

tar in British English 1
noun: any of various dark viscid substances obtained by the destructive distillation of organic matter such as coal, wood, or peat

tar in British English 2
noun