From WordNet (r) 3.0 (2006) [wn]:
thatch
n 1: hair resembling thatched roofing material
2: plant stalks used as roofing material
3: an English pirate who operated in the Caribbean and off the
Atlantic coast of North America (died in 1718) [syn: Teach,
Edward Teach, Thatch, Edward Thatch, Blackbeard]
4: a house roof made with a plant material (as straw) [syn:
thatch, thatched roof]
v 1: cover with thatch; "thatch the roofs"
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Thatch \Thatch\, n. [OE. thak, AS. [thorn][ae]c a roof; akin to
[thorn]eccean to cover, D. dak a roof, dekken to cover, G.
dach a roof, decken 8cover, Icel. [thorn]ak a roof, Sw. tak,
Dan. tag, Lith. st[=o]gas, Ir. teagh a house, Gael. teach,
tigh, W. ty, L. tegere to cover, toga a toga, Gr. ?, ?, a
roof, ? to cover, Skr. sthag. Cf. Deck, Integument,
Tile, Toga.]
1. Straw, rushes, or the like, used for making or covering
the roofs of buildings, or of stacks of hay or grain.
[1913 Webster]
2. (Bot.) A name in the West Indies for several kinds of
palm, the leaves of which are used for thatching.
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Thatch sparrow, the house sparrow. [Prov. Eng.]
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From The Collaborative International Dictionary of English v.0.48 [gcide]:
Thatch \Thatch\, v. t. [imp. & p. p. Thatched; p. pr. & vb. n.
Thatching.] [From Thatch, n.: cf. OE. thecchen, AS.
?eccean to cover.]
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.
[1913 Webster]