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Definition of irregular
irregular - adj. not occurring at expected times; independent in behavior or thought; of a surface; not level or flat; lacking continuity or regularity; contrary to rule or accepted order or general practice; (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; deviating from normal expectations; somewhat odd, strange, or abnormal; 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.
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