(aviation) The critical angle; the angle of attack beyond which an airfoil stalls (loses lift and gains drag).

plural of stall angle

(aviation) The airspeed at which the lift generated by an aircraft flying with an angle of attack equal to the stall angle (the point of maximum lift for a given airspeed) is exactly equal to the aircraft's weight; the minimum airspeed at which it is possible to maintain level unaccelerated flight.

To make publicly clear one's position with reference to a particular idea or philosophy.