Subjacent Support
Defined in 2 dictionaries — Cyclopedic (1922), Ballentine's (1916)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
An easement of support of the soil as against an adjoining tract of land, so that the dominant tract shall not fall in by reason of undermining or withdrawal of support from beneath. Tiedeman, Real Prop. § 618; 66 Pa. St. 429.
Ballentine's Law Dictionary
James A. Ballentine · 1916
The right to have one’s soil intact as against the excavations of his neighbor.