Open English Wordnet
Nouns
(n)irregular, secondmerchandise that has imperfections; usually sold at a reduced price without the brand name Adjectives
(a)irregularcontrary to rule or accepted order or general practice“irregular hiring practices” (a)irregular(used of the military) not belonging to or engaged in by regular army forces“irregular troops”,
“irregular warfare” (a)irregular(of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement (s)irregularfailing to meet a standard of manufacture due to an imperfection“an irregular pair of jeans” (s)atypical, irregulardeviating from normal expectations; somewhat odd, strange, or abnormal“these days large families are atypical”,
“atypical clinical findings”,
“atypical pneumonia”,
“highly irregular behavior” (s)irregular, temporarylacking continuity or regularity“an irregular worker”,
“employed on a temporary basis” (s)irregular(of a surface or shape); not level or flat or symmetrical“walking was difficult on the irregular cobblestoned surface” (s)irregular, maverick, unorthodoxindependent in behavior or thought“she led a somewhat irregular private life”,
“maverick politicians”