Regular

The term regular can mean normal or in accordance with rules. It may refer to:

Entertainment

• Regular Show, an animated television series
• The Regular Guys, a radio morning show based out of Atlanta, Georgia
• Regular Joe, the second studio album by American country music artist Joe Diffie

Language

• Regular inflection, the formation of derived forms such as plurals in ways that are typical for the language
• Regular script, the newest of the Chinese script styles

Mathematics

There is an extremely large number of unrelated notions of "regularity" in mathematics.

Probability and statistics

• Regular conditional probability, a concept that has developed to overcome certain difficulties in formally defining conditional probabilities for continuous probability distributions
• Regular stochastic matrix, a stochastic matrix such that all the entries of some power of the matrix are positive

Topology

• Regular (or $T_3$) space, a topological space in which a point and a closed set can be separated by neighborhoods
• Regular homotopy
• Free regular set, a subset of a topological space that is acted upon disjointly under a given group action
• Regular isotopy in knot theory, the equivalence relation of link diagrams that is generated by using the 2nd and 3rd Reidemeister moves only

Other sciences

• Regular bowel movements, the opposite of constipation
• Regular solutions in chemistry, solutions that diverge from the behavior of an ideal solution only moderately
• Regular economy, an economy characterized by an excess demand function whose slope at any equilibrium price vector is non-zero

Other uses

• Regular character, a main character who appears more frequently and/or prominently than a recurring character
• Regular customer, a person who visits the same restaurant, pub, store, or transit provider frequently
• Regular tunings of stringed instruments, tunings with equal intervals between the paired notes of successive open strings
• Regular footedness in boardsports, a stance in which the left foot leads
• Regular division of the plane, a series of drawings by the Dutch artist M. C. Escher which began in 1936
• The Regular Baptists, an 18th-century American and Canadian Baptist group
• Regular moon, a natural satellite that has low eccentricity and a relatively close and prograde orbit