[ai-roh-biks] 
| 1. | Also called aerobic exercises. (used with a plural verb ) any of various sustained exercises, as jogging, rowing, swimming, or cycling, that stimulate and strengthen the heart and lungs, thereby improving the body's utilization of oxygen. |
| 2. | (used with a singular verb) a physical fitness program based on such exercises: Aerobics is a good way to get your body in shape. |
Exercise designed specifically to improve cardiovascular fitness and, subsequently, the body's use of oxygen. Also called aerobic exercise.
Note: The term aerobics usually refers to a specific kind of vigorous exercise, sometimes involving dance steps, that is set to music. Other forms of aerobic exercise include running, cycling, and swimming.
aerobics aer·o·bics (â-rō'bĭks)
n.
A system of physical conditioning to enhance circulatory and respiratory efficiency that involves vigorous, sustained exercise, such as jogging, swimming, or cycling, thereby improving the body's use of oxygen.
A program of physical fitness that involves such exercise.