thatch

When straw or other dried grasses are used to cover a roof, it's called thatch. People have used thatch to keep the rain out for at least 300 years.

Although dry grasses might not seem like the sturdiest roof, thatch is actually a rain-proof, insulating substance. These days it's most common to find thatched roofs in developing countries, but some people use it for a deliberately rustic look. If someone describes your hair as thatch, they mean it looks as dry, messy, and thick as the thatch used as a roofing material. The root of thatch means "to cover."

Definitions of thatch
  1. noun
    plant stalks used as roofing material
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    type of:
    roofing material
    building material used in constructing roofs
  2. noun
    a house roof made with a plant material (as straw)
    synonyms: thatched roof
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    type of:
    roof
    a protective covering that covers or forms the top of a building
  3. noun
    hair resembling thatched roofing material
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    type of:
    coif, coiffure, hair style, hairdo, hairstyle
    the arrangement of the hair (especially a woman's hair)
  4. verb
    cover with thatch
    thatch the roofs”
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    type of:
    roof
    provide a building with a roof; cover a building with a roof
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