Of a fuel–air mixture in an internal combustion engine: containing a high proportion of fuel; spec. in excess of what can be completely combusted…

(in an internal combustion engine) a non-homogeneous mixture of air and fuel, in which a richer fuel is provided for ignition and a leaner one for…

Engineering. Of the fuel–air mixture in an internal combustion engine: increased in pressure by mechanical means.

Of the mixture in an internal-combustion engine: = lean, adj. 4g.

Engineering. A circular motion imparted to the mixture entering the cylinder of an internal-combustion engine. Frequently attributive.

colloquial. = supercharged, adj. (Cf. blower, n.1 3d.)

Engineering. In some internal-combustion engines, the forced radial flow of mixture from the cylinder into the combustion chamber as the piston…

colloquial. Designating a vehicle or engine without a turbocharger. Cf. blown, adj.1 5f.