A future estate is one limited to commence at a future day, either without the intervention of a precedent estate or after the expiration or determination of a precedent estate created at the same time and by the same conveyance or devise.
D.C. Code § 42-510
Future estates — Commencement
Mar. 3, 1901, 31 Stat. 1351, ch. 854, § 1020
Official source: D.C. Law Library (Council of the District of Columbia). Reproduced from public-domain District of Columbia statutes; confirm against the official source for the current text. Not legal advice.