THICK (3)

Thick (thĭk), adv. [[AS. þicce.]] 1. 1. Frequently; fast; quick.
2. 2. Closely; as, a plat of ground thick sown.
3. 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. L'Estrange.