1. Contrary to rule or accepted order or general practice
   "irregular hiring practices"
    
2. Not occurring at a regular rate or fixed intervals
   "an irregular heartbeat";
   - unpredictable
    
3. (used of the military) not belonging to or engaged in by regular army forces
   "irregular troops"; "irregular warfare"
    
4. (of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement
   "The irregular shape of the rock made it difficult to calculate its volume"
    
5. Failing to meet a standard of manufacture due to an imperfection
   "an irregular pair of jeans"
    
6. Deviating from normal expectations; somewhat odd, strange, or abnormal
   "highly irregular behaviour";
   - atypical
    
7. Lacking continuity or regularity
   "an irregular worker";
   - temporary
    
8. (of a surface or shape); not level or flat or symmetrical
   "walking was difficult on the irregular cobblestoned surface"
    
9. Independent in behaviour or thought
   "she led a somewhat irregular private life";
   - maverick, unorthodox

1. A member of an irregular armed force that fights a stronger force by sabotage and harassment
   "The irregulars launched surprise attacks on government outposts";
   - guerrilla, guerilla, insurgent
    
2. Merchandise that has imperfections; usually sold at a reduced price without the brand name
   "She bought irregulars at the outlet store to save money";
   - second

Derived forms: irregulars

See also: abnormal, asymmetric, asymmetrical, casual, crooked, illegal, imperfect, improper, occasional, partisan, partizan [rare], part-time, randomised [Brit], randomized, regularity, rough, sporadic, strong, unconventional, uneven, unnatural, unrhythmic, unrhythmical, unsmooth, unsteady, unsystematic

Type of: merch [informal], merchandise, product, ware, warrior

Antonym: regular

Part of: guerilla force, guerrilla force

Encyclopedia: Irregular