norm

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A standard, model, or pattern regarded as typical: the current middle-class norm of two children per family.
2. n. Mathematics A mode.
3. n. Mathematics An average.
4. n. Mathematics The length of a vector.

Century Dictionary and Cyclopedia

1. n. A rule; a pattern; a model; an authoritative standard.
2. n. In biology, a typical structural unit; a type.
3. n. In petrography, in the quantitative classification (see rock), the standard mineral composition of an igneous rock, that is, the chemical composition expressed in terms of standard minerals.
4. n. An abbreviation of Norman.

Wiktionary

1. n. That which is regarded as normal or typical.
2. n. A rule that is enforced by members of a community.
3. n. A sentence with non-descriptive meaning, such as a command, permission, or prohibition.
4. n. A 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. n. if v\ne0 then \left\|v\right\|\ne0;
6. n. given a scalar k, \left\|kv\right\|=\left|k\right|\cdot\left\|v\right\|, where \left|k\right| is the absolute value of k;
7. n. given two vectors v,w, \left\|v+w\right\|\le\left\|v\right\|+\left\|w\right\| (the triangle inequality).
8. v. To endow (a vector space, etc) with a norm.

GNU Webster's 1913

1. n. A rule or authoritative standard; a model; a type.
2. n. A typical, structural unit; a type.

WordNet 3.0

1. n. a statistic describing the location of a distribution
2. n. a standard or model or pattern regarded as typical