irregular

Adjective

• independent in behavior or thought
  • she led a somewhat irregular private life
    
  • maverick politicians
    

• (of a surface or shape); not level or flat or symmetrical
  • walking was difficult on the irregular cobblestoned surface
    

• lacking continuity or regularity
  • an irregular worker
    
  • employed on a temporary basis
    

• deviating from normal expectations; somewhat odd, strange, or abnormal
  • these days large families are atypical
    
  • atypical clinical findings
    
  • atypical pneumonia
    
  • highly irregular behavior
    

• falling below the manufacturer's standard
  • irregular jeans
    

• (of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement

• (used of the military) not belonging to or engaged in by regular army forces
  • irregular troops
    
  • irregular warfare
    

• not occurring at expected times

• contrary to rule or accepted order or general practice
  • irregular hiring practices
    

Noun

• merchandise that has imperfections; usually sold at a reduced price without the brand name

• a member of an irregular armed force that fights a stronger force by sabotage and harassment

Related words

• Synonyms: 
  maverick , unorthodox , temporary , atypical , unpredictable , second , guerrilla , guerilla , insurgent