A city, the county seat of Allegheny County, Pennsylvania, United States.

plural of Pittsburgher

A native or inhabitant of Pittsburgh.

(of a piece of meat) Very well done on the surface and very rare internally.

(US, transport) The act of an automobile driver to immediately turn left on the onset of a green light, regardless of the driver's right of way.

plural of Pittsburgh left

A radioactive analog of thioflavin T, used in investigational studies of Alzheimer's disease.