Regular

The term regular can mean normal or obeying rules. Regular may refer to:

In organizations:
* Regular Army for usage in the U.S. Army
* Regular clergy, members of a religious order subject to a rule of life
* Regular Force for usage in the Canadian Forces
* Regular Masonic jurisdictions, or "regularity", refers to the constitutional mechanism by which Freemasonry Grand Lodges or Grand Orients give one another mutual recognition.

In mathematics, geometry, and statistics:
* Regular cardinal, a cardinal number that is equal to its cofinality
* Regular category, a kind of category that has similarities to both Abelian categories and to the category of sets
* Regular code, an algebraic code with a uniform distribution of distances between codewords
* Regular graph, a graph such that all the degrees of the vertices are equal
* Regular polygon, a polygon where all angles and all sides are equal
* Regular polyhedron, a 3-dimensional equivalent to a regular polygon
* Regular prime, a certain kind of prime number
* Regular space, a topological space in which a point and a closed set can be separated by neighbourhoods
* Regularity, the degree of differentiability of a smooth function
* Regularity conditions arise in the study of first class constraints in Hamiltonian mechanics
* Regularity of an elliptic operator
* Axiom of Regularity, also called the Axiom of Foundation, an axiom of set theory asserting the non-existence of certain infinite chains of sets

In other uses:
* Regular character, a main character who appears more frequently and/or prominently than a recurring character
* Regular expression, a type of pattern describing a set of strings in computer science
* Regular verb, a grammatical term for a verb with derived forms that are typical for the language

ee also

* Irregular