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irregular

irregular

16 3.3
Not even or smooth in shape
  • adjective
  • /ɪˈrɛɡjələr/
translation icon : irregular
  • As an observation point, I've chosen a slightly irregular, flat figure near the edge of the garden.
  • an irregular shape
  • an irregular surface
  • an irregular outline

We've seen in the photographs that they're sort of irregular grey colour.

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Examples

  • The creature was pink and dappled with irregular patches of brown and white like a pinto pony.

    Fiction book (1991)
  • The shoreline of Cook Inlet is irregular, comprised of a series of channels, coves, flats, and marshes.

    Academic text (2000)
  • Even when you have irregular shapes, you will see that.

  • The rock was pretty, and I was studying its irregular shapes in the light.

    Fiction book (2001)
  • Everywhere he looks, he can see irregular streams of red and yellow flames.

    Fiction book (1990)
  • Where the fjord widens into a small inland sea lies the irregular, oblong island of Mors.

    Academic text (1995)
  • The artist preferred to use irregular shapes in her sculptures to create a unique visual effect.

  • The geologist noted that the rock formations had irregular surfaces that resulted from natural erosion.

  • Her garden featured an irregular layout with paths that wound around uneven flower beds.

Synonyms

erratic
vsirregular
94 6.1

Not regular or predictable and likely to change suddenly

refers to not even physical shape and nonstandard measurability rather than unpredictability
uneven
vsirregular
42 2.3

Not smooth or level, with parts higher and lower

is broader, also covering asymmetry and cases not measurable by standards
asymmetrical
vsirregular
18 6.1

Having parts that are not the same size or shape

is broader, also covering uneven surfaces and things not measurable normally
difform
vsirregular
9.9

An object that has an uneven or irregular shape

is broader, also covering surface roughness and nonstandard measurability
unlevel
vsirregular
3.9

Not flat, like a floor or table with an uneven surface

is broader, including uneven slopes plus asymmetry and unmeasurable cases
unsmooth
vsirregular
6.2

A surface that is uneven and feels rough to touch

is broader, also applying to uneven shape and non measurable forms
nonsymmetrical
vsirregular
5.1

Not the same on both sides in shape or design

is broader, also including surface irregularity and nonstandard measurability

Antonyms

57 1.0

Having parts that match in size and shape

25 4.1

A shape or object that has matching parts on both sides when you cut it down the middle

18 1.0

Flat and level in shape, position, or timing

Compounds

Happening at times that are not regular or predictable

How Smooth

polished
26 2.1
smooth
256 1.0
irregular
16 3.3
uneven
42 2.3
rough
164 1.0
bumpy
68 1.0
jagged
22 3.6

Surface Forms

irregular positive
irregularer comparative
irregularest superlative

Morphology

irregular = regular (transparent) = ir + regular

The sense is the straightforward negative of 'regular' (not even/symmetric), produced by prefixation with 'ir-'.

Etymology

Irregular comes from the parts in- meaning 'not' and regular meaning 'even' or 'in order', like regular shapes such as a square or circle. So an irregular object is not even or smooth and does not have a simple, regular shape.