Emily Dickinson Lexicon

CEIL, v.t. [Sp. cielo, heaven, a roof or ceiling; It. cielo; Fr. ciel, heaven, a canopy, a tester; L. cælum. Qu. Gr. κοιλος. This word indicates its original application to vaulted buildings, without divisions into stories; such as many of the public edifices in Europe, but which are rarely seen in America.]

To overlay or cover the inner roof of a building; or to cover the top or roof of a room. And the greater house he ceiled with fir-tree. – 2 Chron. iii.