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 See also Anomaly (disambiguation) Baker Street Irregulars Regular (disambiguation)