(colloquial) the mineral aluminite.

plural of ball alley

(baseball) The areas of deep right-center and deep left-center field where home runs are most likely to be hit. / (audio engineering) The line between two subwoofers where both are in phase.

Used other than figuratively or idiomatically: see blind, alley. A street or passageway that leads nowhere. / (figuratively) A course of inquiry that leads nowhere.

(geography, meteorology) Area located in the middle of the USA, where tornadoes are particularly frequent and intense.

plural of back alley

plural of blind alley

(nautical) A passage extending from the engine room to the stern, and containing the propeller shaft.

simple past tense and past participle of alley crop

(CB radio slang) A particularly crowded portion of the 20-meter band.