Diesel engine means an engine which works on the compression-ignition principle.
Engine under the Lease. The term "Engines" means, as of any date of determination, both Engines then leased to the Lessee pursuant to the Lease.
Nonroad Engine means an internal combustion engine (including the fuel system) that is not used in a Motor Vehicle or a vehicle used solely for competition, or that is not subject to standards promulgated under section 7411 or section 7521 of title 42 of the United States Code, except that this term shall apply to internal combustion engines used to power generators, compressors or similar equipment used in any construction program or project.
Public aircraft means an aircraft used exclusively in the service of any government or of any political subdivision thereof, including the government of any state, territory, or possession of the United States, or the District of Columbia, but not including any government-owned aircraft engaged in carrying persons or property for commercial purposes.