For purposes of sections 2421a to 2421e of this title—

(1) the term “AID” means the Agency for International Development; and

(2) the term “capital project” means a project involving the construction, expansion, alteration of, or the acquisition of equipment for, a physical facility or physical infrastructure, including related engineering design (concept and detail) and other services, the procurement of equipment (including any related services), and feasibility studies or similar engineering and economic services.