1. A state of feeling sympathy or understanding towards another person; like-mindedness: Jack and Jill appeared to have a lot of compatibility in their marriage, but Bill and Patty didn't get along with each other and separated within a year!
2. A condition of existing or functioning in harmony or in congenial combination: Lisa's computer programs do not have compatibility with the kind of programs Mary has on her computer, so Lisa can't use such programs on her own computer because they wouldn't work!

1. The extent to which a piece of hardware will tolerate electrical interference from other equipment, and will interfere with other equipment.
2. The capability of electronic equipment or systems to be operated in the intended electromagnetic environment at design levels of efficiency.
3. The ability of electronic equipment and systems to operate in the proximity of electromechanical devices, without causing or suffering unacceptable degradation in output or performance.
4. The capacity of an appliance or circuit to function correctly in its intended electromagnetic environment without transmitting unwanted signals to adjacent equipment or receiving unwanted interference from nearby sources.