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irregular

irregular

14 3.4
Not following a usual pattern or rule
  • adjective
  • /ɪˈrɛɡjələr/
translation icon : irregular
  • The landscape displayed an irregular pattern of hills and valleys, making it unique.
  • irregular patterns
  • highly irregular
  • regular and irregular

We think that all of that stuff in the wild orbits is what we call irregular moons.

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Examples

  • The most frequent factors behind poor psychological state were sleep disorders, an intolerance of irregular working hours, and psychological stress.

    Academic text (2015)
  • One finding was that irregular forms were particularly difficult for these children.

    Academic text (2015)
  • Her periods were always irregular, but this time she was over a month late.

    Fiction book (2000)
  • An unusual and highly irregular set of circumstances gave me the opportunity to teach African American religion.

    Academic text (1995)
  • Self-employed people and other irregular workers pay by themselves.

    Academic text (2007)
  • During word-level practice in reading lessons, irregular words are spelled.

    Academic text (2015)
  • Her menstrual cycle is often irregular, which can be a sign of a health issue.

  • He noticed that his heartbeat was irregular, prompting him to see a doctor.

Synonyms

unusual
vsirregular
2.2

Not common and different from what people expect

focuses on breaking regular patterns or standards rather than simple rarity
odd
vsirregular
798 1.0

Different from what is normal or expected

is concerned with nonstandard patterns or rule deviations rather than strange quality
other
vsirregular
515 8.6

Very different from what is usual or expected

is broader, referring to any nonstandard pattern or deviation from rules
peculiar
vsirregular
123 4.6

Different from what is normal and expected

is less about oddness and more about failing to follow rules
abnormal
vsirregular
100 4.2

Different from what is usual in a way that may be worrying

is a more neutral label for not following normal patterns or rules
erratic
vsirregular
94 6.1

Not regular or predictable and likely to change suddenly

is broader, including any nonstandard or uncommon forms not just sudden change
unconventional
vsirregular
77 6.2

Different from what most people do or accept

is more general, covering any deviation from standard patterns or rules
unorthodox
vsirregular
52 7.3

Not following the usual rules or customs

is broader, applying to any nonstandard or unusual form or pattern
uneven
vsirregular
42 2.3

Not smooth or level, with parts higher and lower

also includes irregularity in wider senses beyond physical unevenness
sporadic
vsirregular
35 7.0

Happening sometimes and in different places

is more general, covering any nonstandard or uncommon patterns
atypical
vsirregular
27 5.7

Different from what is usual or expected

focuses more on breaking regular patterns or standards rather than rarity
anomalous
vsirregular
23 8.1

Not like what is usual or expected

is similar but often used more generally for any rule breaking
aberrant
vsirregular
14 8.2

Different from what is normal, often in a way people see as wrong

is broader and can be neutral or merely unexpected rather than unacceptable
nonlinear
vsirregular
1 6.3

A story or plan that is not in time order and has no clear pattern

is broader, applying to any deviation from expected rules or patterns
unordinary
vsirregular
1 7.0

Not usual and different from what you expect

focuses specifically on pattern or rule breaking rather than mere difference
patternless
vsirregular
1 5.4

Without any visible pattern

can include cases that break patterns but may hide a rule
non-typical
vsirregular
4.8

Not usual or expected

is about not following regular patterns or standard rules
nonsystematic
vsirregular
6.7

Not arranged according to a plan or regular order

covers that lack of system but also other unusual deviations
noncyclical
vsirregular
7.2

Not happening in regular cycles

covers that nonrepetition but also other unusual or nonstandard cases
non-routine
vsirregular
4.8

Different from the usual way of doing things

is wider, including any nonstandard pattern, not only exceptional tasks
non-normal
vsirregular
  • Specialized
7.7

Not following the usual or expected pattern in data

is broader, applying outside technical contexts to general rule breaking
heteroclite
vsirregular
9.9

Different from the usual form or pattern

is a general term for any nonstandard or unusual pattern or rule breach

Antonyms

1.0

Usual or expected in most situations

870 1.0

Happening at fixed times on a schedule

675 2.7

Generally used and accepted as correct

57 1.0

Having parts that match in size and shape

Compounds

Happening at times that are not regular or predictable

How Irregular

bizarre
406 5.9
abnormal
100 4.2
irregular
14 3.4
atypical
27 5.7
unusual
2.2
typical
843 1.0

Surface Forms

irregular positive
irregularer comparative
irregularest superlative

Morphology

irregular = regular (transparent) = ir + regular

Formed by the negative prefix 'ir-' added to 'regular'; the meaning is the straightforward negation of 'regular'.

Etymology

Irregular comes from the parts in- meaning 'not' and regular meaning 'following a rule' or 'usual'. So an irregular opinion or way of doing things is one that does not follow the usual rule or pattern.