Plain English Meaning
It's the picture of where the airplane is going and how fast it's flying at each stage. Together, the path it traces through the sky and the airspeed at each point form the profile.
Full Definition
The combined pattern of an airplane's vertical and horizontal track through the air (the flightpath) and its airspeed at each point along that track. A flightpath-airspeed profile describes how altitude, climb or descent angle, and airspeed change together through a maneuver or phase of flight, such as takeoff, climb, cruise, approach, and landing.
Context Anchor
Seen in maneuver training, approach practice, landing discussions, and any lesson where is expected to fly a path at a specific .