1. A required or an acceptable standard, model, or pattern regarded as typical: In many Western Societies, two children per family is still considered the middle-class norm.
2. In education, a designated standard of average performance of students of a given age, background, etc.; or a standard based on the past average performance of a given individual: Sally's daughter scored well above the norm in all of her courses this year.
3. The most frequent behavior that the members of a group will show in a specific situation: Warren is strict about maintaining the legal norm when he is driving by not exceeding the speed limit and paying attention to the conditions when he is driving on the city streets and highways.