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

In organizations:

• Regular Army for military usage
• 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 element, a certain kind of element of an algebraic structure
• Regular graph, a graph such that all the degrees of the vertices are equal
• Regular language, a formal language recognizable by a finite state automaton
• 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 representation of a group G, the linear representation afforded by the group action of G on itself
• Regular singular point in theory of ordinary differential equations where the growth of solutions is bounded by an algebraic function
• Regular space, a topological space in which a point and a closed set can be separated by neighbourhoods
• Regular surface in algebraic geometry
• 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
• Castelnuovo–Mumford regularity of a coherent sheaf

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

Adjective

regular (comparative more regular, superlative most regular)

1. With constant frequency or pattern.
2. (mostly US) Normal; ordinary
3. Obeying rules, especially rules of a monastery.
4. (grammar, of a verb, plural, etc) Following a set or common pattern.

   The verb "to walk" is regular.

   The noun "mouse" has the irregular plural "mice".

5. Frequent or common

   He made regular visits to go see his mother.

6. (snowboarding) Riding with the left foot forward.
7. Exemplary; excellent example of; utter.

   a regular genius

   a regular John Bull

8. (geometry, of a polygon or a polyhedron) Having all sides of the same length, and all (corresponding) angles of the same size.
9. Having a healthy digestive system.

   Maintaining a high-fibre diet keeps you regular.

• (with constant frequency): uniform
• (normal): normal
• (grammar) weak (verbs)
• steady

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