Oblique shock wave
A shock wave that forms on a sharp-pointed object moving through air at a speed greater than the speed of sound. Air passing through an oblique shock wave is slowed down, but not to a subsonic speed, and its static pressure is increased.
Aviation Maintenance Technician Handbook — Airframe, p. G-24
Also defined in 1 more source
A pressure wave that forms on a sharp-pointed object when air flows past it at a supersonic speed.
Aviation Maintenance Technician Handbook — Powerplant, p. G-19