irregular


Concise Oxford English Dictionary © 2008 Oxford University Press:
irregular/ɪˈreɡjələ(r)/
adjective
  • 1 not regular in shape, arrangement, or occurrence.
  • 2 contrary to a rule, standard, or convention.

    ■ not belonging to regular army units.

  • 3 Grammar (of a word) having inflections that do not conform to the usual rules.
noun
  • 1 a member of an irregular military force.
  • 2 chiefly N. Amer. an imperfect item of merchandise sold at a reduced price.
– derivatives
irregularity noun (pl. irregularities),
irregularly adverb.
'irregular' also found in these Oxford entries:

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