[roof-lis, roof-]
having no roof.
without the shelter of a house: roofless refugees.

1600–10; roof + -less Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To roofless
World English Dictionary
roof (ruːf)
n , pl roofs
1.  a.  a structure that covers or forms the top of a building
 b.  (in combination): the rooftop
 c.  (as modifier): a roof garden
2.  the top covering of a vehicle, oven, or other structure: the roof of a car
3.  anatomy any structure that covers an organ or part: the roof of the mouth
4.  a highest or topmost point or part: Mount Everest is the roof of the world
5.  a house or other shelter: a poor man's roof
6.  mountaineering the underside of a projecting overhang
7.  informal hit the roof, go through the roof
 a.  to get extremely angry; become furious
 b.  to rise or increase steeply
8.  raise the roof
 a.  to create a boisterous disturbance
 b.  to react or protest heatedly
9.  (tr) to provide or cover with a roof or rooflike part
[Old English hrōf; related to Middle Dutch, Old Norse hrōf]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
We stop for lunch in the shade of a roofless guard tower.
More commonly, you will see roofless concrete shells, the ruins of
  communist-era collective farms or tractor stations.
On each side of a roofless patio is a ten- room jumble.
The so-called exhibition room remained a roofless shell.
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