Definitions
1.nounThat which is normal or typical."Unemployment is the norm in this part of the country."
2.nounA rule that is enforced by members of a community."Not eating your children is just one of those societal norms."
3.nounA sentence with non-descriptive meaning, such as a command, permission or prohibition.
4.nounA function, generally denoted v\mapsto\left|v\right| or v\mapsto\left\|v\right\|, that maps vectors to non-negative scalars and has the following properties:
5.nounA high level of performance in a chess tournament, several of which are required for a player to receive a title.