0 past simple and past participle of exercise
1 to do physical activities to make your body strong and healthy:
2 to use something:
Aerobics is one of the most stimulating ways of exercising.
If I have to exercise, I'd prefer walking or cycling to organized sport.
We need to exercise some control on this situation before we find ourselves in serious trouble.
The security forces exercised great restraint by not responding to hostile attacks and threats.
The United Nations has exercised its authority to restore peace in the area.