Straw, rushes, or the like, used for making or covering the roofs of buildings, or of stacks of hay or grain.
- Plant stalks or foliage, such as reeds or palm fronds, used for roofing.
- Something, such as a thick growth of hair on the head, that resembles thatch.
- Dead turf, as on a lawn.
- To cover with or as if with thatch.