Plain English Meaning
When something moves in a circle or curve, there has to be a force pulling it toward the middle of that curve. That inward pull is centripetal force.
Full Definition
The inward force that acts on an object moving along a curved path, pulling it toward the center of the curve and keeping it on that curved path rather than continuing in a straight line.
Context Anchor
Seen in discussions of aircraft turns, propellers, wheels, and other rotating aircraft parts.
Derivation
From Latin 'centrum' (center) and 'petere' (to seek). Literally 'center-seeking.' That captures the idea exactly: a force that pulls the object toward the center of its circular path.
Why Pilots Care
In a banked turn the horizontal component of lift supplies this force; insufficient centripetal force causes the airplane to skid outward.
Analogy
Think of swinging a weight on a string in a circle. The tension in the string pulling the weight toward your hand is the centripetal force. Let go of the string and the weight flies off in a straight line.
Grounding Statement
Whenever something is moving in a circle, some force must be acting inward toward the center of that circle.
Intuition Check
Do not confuse centripetal force with the outward feeling you may notice in a turn. Centripetal force is the real inward force that makes the curved motion happen.
Example Sentence 1
During a level turn, the horizontal component of lift supplies the centripetal force needed to curve the aircraft's flight path.
Example Sentence 2
If bank angle is too shallow for the turn rate, the airplane lacks enough centripetal force and drifts outside the intended curved path.