Also, thatching. a material, as straw, rushes, leaves, or the like, used to cover roofs, grain stacks, etc.

a covering of such a material.

the leaves of various palms that are used for thatching.

something resembling thatch on a roof, esp. thick hair covering the head

a thatch of unruly red hair.

Horticulture . a tightly bound layer of dead grass, including leaves, stems, and roots, that builds up on the soil surface at the base of the living grass of a lawn.

to cover with or as if with thatch.

Horticulture . to remove thatch from (a lawn); dethatch.