Here is the meaning of the word, TAR

Tar ( n. ) - A sailor; a seaman.
Tar ( n. ) - A thick, black, viscous liquid obtained by the distillation of wood, coal, etc., and having a varied composition according to the temperature and material employed in obtaining it.
Tar ( v. t. ) - To smear with tar, or as with tar; as, to tar ropes; to tar cloth.