Now rare or Obs. Also through-light.
a. pl. Windows on opposite sides of a room, so that the light passes right through.
1625. Bacon, Ess., Building (Arb.), 551. And let all three Sides, be a double House, without Thorow Lights, on the Sides, that you may haue Roomes from the Sunne, both for Fore-noone, and Afternoone.
1642. Fuller, Holy & Prof. St., III. vii. 167. Thorow-lights are best for rooms of entertainment, and windows on one side for dormitories.
1697. Dryden, Æneid, VIII. 349. The doors, unbarr’d, receive the rushing day; And thorough lights disclose the ravish’d prey.
1745. P. Thomas, Jrnl. Anson’s Voy., 230. The Houses have thorough Lights.
b. fig. (sing. and pl.) in reference to the ‘light’ of knowledge or discovery.
1605. Bacon, Adv. Learn., II. ii. § 13. This great Building of the world had neuer through lights made in it till the age of vs and our fathers.
1642. Fuller, Holy & Prof. St., II. xxi. 137. [Drake] returned safe into England, and landed at Plimouth, (being almost the first of those that made a thorow-light through the world).
1646. Trapp, Comm. John i. 5. The former [light of nature] is but a dim half-light…. The latter [light of Scripture] is a clear thorough-light.
1698. Norris, Pract. Disc., IV. 44. All shall be then open,… every Man’s Heart a thorough-light to every Man.
1841. Emerson, Lect. ‘Times,’ Wks. (Bohn), II. 256. Paving the earth with eyes, destroying privacy, and making thorough-lights.
So Thorough-lighted (through-) a., having thorough-lights; having the light passing through.
1624. Wotton, Archit., in Reliq. (1651), 286. Rooms windowed on both ends, which we call through-lighted.
1703. T. N., City & C. Purchaser, 260. Rooms are said to be Through-lighted when they have Windows on both ends.
1842–76. Gwilt, Archit., Gloss., Thorough lighted Rooms, such as have windows on opposite sides.
