I. ˈthach transitive verb
Etymology: Middle English thecchen, from Old English theccan to cover; akin to Old High German decchen to cover, Latin tegere, Greek stegein to cover, stegos roof, Sanskrit sthagati he covers
Date: 14th century
: to cover with or as if with thatch
• thatch·er noun
II. noun
Date: 14th century
1.
a. : a plant material (as straw) used as a sheltering cover especially of a house
b. : a sheltering cover (as a house roof) made of such material
c. : a mat of undecomposed plant material (as grass clippings) accumulated next to the soil in a grassy area (as a lawn)
2. : something likened to the thatch of a house ; especially : the hair of one's head