Landfill
Landfill means an area of land or an excavation in which wastes are placed for permanent disposal, and that is not a land application unit, surface impoundment, injection well, or waste pile as those terms are defined under 257.2 of this title.
Source
40 CFR § 60.751
Scoping language
As used in this subpart, all terms not defined herein shall have the meaning given them in the Act or in subpart A of this part.