Plain English Meaning
Flying at a speed that is only a little faster than the speed at which the wing would stop producing enough lift. The nose is held high, the airplane feels mushy, and you need extra power to keep it from sinking.
Full Definition
Flight at airspeeds just above the stall, where the airplane is operating on the back side of the power curve and requires higher angles of attack and increased power to maintain altitude and controlled flight.
Context Anchor
Seen in basic flight training when practicing straight-and-level flight, low-speed handling, approaches, and for .