1. Below means lower in number or degree than. Your body temperature is ninety-seven degrees; it is below normal, which is ninety-eight point six.
2. Below can mean lower in rank or level than. In our company the supervisors are below the directors. Our offices are on the fourth floor; theirs are below ours, on the third floor.
3. Below can mean farther along than. There is a picnic ground just below the bridge.
4. Expression
below the belt�unfairly, not according to the rules He pretended to be her friend, then applied for her job. That was really below the belt.