irregular

nouns

a member of an irregular armed force that fights a stronger force by sabotage and harassment
merchandise that has imperfections; usually sold at a reduced price without the brand name

adjectives

contrary to rule or accepted order or general practice
"irregular hiring practices"
is derived from
is derived from
antonym
is similar to
irregular in shape or outline
"asymmetrical features"; "a dress with a crooked hemline"
is similar to
occurring from time to time
"casual employment"; "a casual correspondence with a former teacher"; "an occasional worker"
is similar to
not conforming to legality, moral law, or social convention
"an unconventional marriage"; "improper banking practices"
is similar to
set up or distributed in a deliberately random way
is similar to
of verbs not having standard (or regular) inflection
"`sing' is a strong verb"
see also
prohibited by law or by official or accepted rules
"an illegal chess move"
see also
not rhythmic; irregular in beat or accent
see also
having or caused by an irregular surface
"trees with rough bark"; "rough ground"; "rough skin"; "rough blankets"; "his unsmooth face"
see also
subject to change or variation
"her unsteady walk"; "his hand was unsteady as he poured the wine"; "an unsteady voice"
see also
characterized by asymmetry in the spatial arrangement or placement of parts or components
see also
lacking systematic arrangement or method or organization
"unsystematic and fragmentary records"; "he works in an unsystematic manner"
is an attribute of
the quality of being characterized by a fixed principle or rate
"he was famous for the regularity of his habits"
not occurring at expected times
is derived from
(used of the military) not belonging to or engaged in by regular army forces
"irregular troops"; "irregular warfare"
antonym
see also
devoted to a cause or party
(of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement
is derived from
antonym
falling below the manufacturer's standard
"irregular jeans"
is similar to
not perfect; defective or inadequate
"had only an imperfect understanding of his responsibilities"; "imperfect mortals"; "drainage here is imperfect"
deviating from normal expectations; somewhat odd, strange, or abnormal
"these days large families are atypical"; "atypical clinical findings"; "atypical pneumonia"; "highly irregular behavior"
is derived from
lacking continuity or regularity
"an irregular worker"; "employed on a temporary basis"
(of a surface or shape); not level or flat or symmetrical
"walking was difficult on the irregular cobblestoned surface"
is derived from
is similar to
not even or uniform as e.g. in shape or texture
"an uneven color"; "uneven ground"; "uneven margins"; "wood with an uneven grain"
independent in behavior or thought
"she led a somewhat irregular private life"; "maverick politicians"
is derived from