I. adjective
1.
not according with or explainable by law, rule, or custom
unusual problems require irregular solutions
Synonyms: abnormal, anomalous, deviant, divergent, off-key, unnatural, unregular
Related Word: aberrant, atypical; exceptional, odd, peculiar, queer, singular, strange, unique
Contrasted words: natural, normal, typical; accustomed, customary, habitual, usual, wonted
Antonyms: regular
2.
Synonyms: informal 1, unceremonious, unofficial
3.
Synonyms: lopsided , asymmetric, disproportionate, nonsymmetrical, off-balance, overbalanced, unbalanced, unequal, uneven, unsymmetrical
Antonyms: regular
4.
Synonyms: random , aimless, designless, desultory, haphazard, hit-or-miss, indiscriminate, purposeless, unaimed, unconsidered
Related Word: occasional, sporadic; erratic, fitful, spasmodic; inconstant, uneven, unsteady
5.
Synonyms: spotty 1, patchy, uneven
II. noun
Synonyms: partisan 2, guerrilla, patriot