1 a [noncount] : dried plant material (such as straw or leaves) that is used to make the roof of a building
▪ Mice were living in the thatch of the roof.
b [count] : a roof made of thatch : a thatched roof
▪ We ate lunch in the shade under the thatch of a beachfront restaurant. 2 [singular] : a thick mass of hair on a person's head
▪ her thatch of dark brown hair
▪ Mice were living in the thatch of the roof.
b [count] : a roof made of thatch : a thatched roof
▪ We ate lunch in the shade under the thatch of a beachfront restaurant.
▪ her thatch of dark brown hair







