Easton's Bible Dictionary (1897)
The covering (1 Kings 7:3, 7) of the inside roof and walls of a house with planks of wood (2 Chr. 3:5; Jer. 22:14). Ceilings were sometimes adorned with various ornaments in stucco, gold, silver, gems, and ivory. The ceilings of the temple and of Solomon’s palace are described 1 Kings 6:9, 15; 7:3; 2 Chr. 3:5, 9.
Smith's Bible Dictionary (1863)
The descriptions of Scripture, (1 Kings 6:9,15; 7:3; 2 Chronicles 3:5,9; Jeremiah 22:14; Haggai 1:4) and of Josephus, show that the ceilings of the temple and the palaces of the Jewish kings were formed of cedar planks applied to the beams or joists crossing from wall to wall.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
CEIL'ING. We have a description of the ceiling of Solomon's temple and palace in 1 Kgs 6:9-10,2 Sam 20:15; 1 Kgs 7:3; 2 Chr 3:5. " Eastern floors and ceilings were just the reverse of ours. Their ceilings were of wood, painted, Jer 22:14, ours are of plaster; their floors were of plaster or some sort of tiles, ours are of wood.