noun a name in the west indies for several kinds of palm, the leaves of which are used for thatching.
2. thatch ·noun straw, rushes, or the like, used for making or covering the roofs of buildings, or of stacks of hay or grain.
3. thatch ·noun to cover with, or with a roof of, straw, reeds, or some similar substance; as, to thatch a roof, a stable, or a stack of grain.