Irregular

Irregular, irregulars or irregularity may refer to any of the following:

Astronomy

 * Irregular galaxy
 * Irregular moon
 * Irregular variable, a kind of star

Language

 * Irregular inflection, the formation of derived forms such as plurals in unpredictable ways
 * Irregular verb

Law

 * Against regulations
 * In canon law, an irregularity is an impediment for the Catholic priesthood or for exercising orders already received

Mathematics

 * Irregularity of a surface
 * Irregularity of distributions
 * Irregularity index

Medicine

 * Irregular bone
 * Arrhythmia, also known as an irregular heartbeat
 * Constipation, also called "irregularity"

Other

 * The Irregulars, a 2021 Netflix series
 * Accounting irregularity
 * Irregular military
 * Irregular chess opening