Step 1 : Introduction to the question "5. What does the term "trimming" most commonly mean in aviation?"
...1. Filing chips from the propeller 2. Use of a tab or wheel to equalise control input/pressure so that no input will maintain current flight status 3. Removal of the wings to fit aircraft in hangar 4. It is a type of spin Trimming controls allow a pilot to balance the lift and drag being produced by the wings and control surfaces over a wide range of load and airspeed. This reduces the effort required to adjust or maintain a desired flight attitude.