ETYM Old Eng. thak, AS. thaec a roof; akin to theccean to cover, Dutch dak a roof, dekken to cover, German dach a roof, decken 8cover, Icel. thak a roof, Swed. tak, Dan. tag, Latin tegere to cover, toga a toga.
1. A house roof made with a plant material (as straw); SYN. thatched roof.
2. Hair resembling thatched roofing material.
3. Plant stalks used as roofing material.

To cover with thatch; of roofs.