DICT.TW Dictionary Taiwan

 Thick adv.
 1. Frequently; fast; quick.
 2. Closely; as, a plat of ground thick sown.
 3. To a great depth, or to a greater depth than usual; as, land covered thick with manure.
 Thick and threefold, in quick succession, or in great numbers. [Obs.] --L'Estrange.