What does ANCIENT LIGHTS mean?

ANCIENT LIGHTS meaning in Law Dictionary

Lights or windows in a house, that have been utilized in their ongoing state, without molestation or interruption. for 20 years, and upwards. To these the master of the house has a risht by prescription or occupancy, so that they may not be obstructed or closed by the owner for the adjoining land that they may overlook. Wright v. Freeman. 5 Har. & J. (Md.) 477; tale v. Odin. 12 Mass. 100. 7 Was. Dec. 81.