Stability

The characteristic of an aircraft that causes it to return to its original flight condition after it has been disturbed.

Aviation Maintenance Technician Handbook — Airframe, p. G-33

Also defined in 1 more source

The inherent quality of an airplane to correct for conditions that may disturb its equilibrium, and to return or to continue on the original flight path. It is primarily an airplane design characteristic.

Pilot's Handbook of Aeronautical Knowledge, p. G-28

Taught in GEN-C Concepts, GEN-J Quick reference.