Plain English Meaning

Flying the airplane intentionally slow — close to the speed at which the wing would stop producing enough lift — so the pilot learns how the aircraft handles when it is on the edge of stalling.

Full Definition

Flight conducted at airspeeds near the lower end of the aircraft's flight envelope, where the wing is operating at a high angle of attack to produce enough lift, and where small changes in pitch, power, or configuration produce disproportionately large effects on aircraft behavior. In this regime the airplane is approaching, but not yet at, an aerodynamic stall.

Context Anchor

Seen in instrument training when practicing precise airplane at , especially while and by to the instruments.