irregular
[adjective]
Synonyms:
- variable, erratic, fitful, haphazard, occasional, random, spasmodic, sporadic, unsystematic
- unconventional, abnormal, exceptional, extraordinary, peculiar, unofficial, unorthodox, unusual
- uneven, asymmetrical, bumpy, crooked, jagged, lopsided, ragged, rough

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Antonyms: regular
Contrasted words: natural, normal, typical, accustomed, customary, habitual, usual, wonted
Related Words: aberrant, atypical, exceptional, odd, peculiar, queer, singular, strange, unique, occasional, sporadic, erratic, fitful, spasmodic, inconstant, uneven, unsteady

[TahlilGaran] English Synonym Dictionary ▲

I. ir‧reg‧u‧lar¹ /ɪˈreɡjələ, ɪˈreɡjʊlə $ -ər/ adjective
[Word Family: noun: regular, regularity ≠ irregularity, regularization; verb: regularize; adverb: regularly ≠ irregularly; adjective: regular ≠ irregular]

1. having a shape, surface, pattern etc that is not even, smooth, or balanced Synonym : uneven Antonym : regular:
a jagged, irregular coastline
It has a highly irregular shape, covered in bumps and indentations.

2. not happening at times that are an equal distance from each other Antonym : regular:
He’s receiving medication for an irregular heartbeat.
Beamish only returned to Britain at irregular intervals.

3. not happening or done at the normal time for doing something Antonym : regular:
Funeral directors often work long, irregular hours.

4. formal not obeying the usually accepted legal or moral rules:
It would be highly irregular (=extremely irregular) for a minister to accept payments of this kind.

5. irregular verb/plural etc a verb or a form of a word that does not follow the usual pattern of grammar, such as the verb ‘catch’ or the plural ‘fish’ Antonym : regular

6. American English a word meaning CONSTIPATEd (=unable to easily pass food waste from your body), used in order to be polite
—irregularly adverb
—irregularity /ɪˌreɡjəˈlærəti, ɪˌreɡjʊˈlærəti/ noun [uncountable and countable]:
The club were found guilty of financial irregularities.

[TahlilGaran] Dictionary of Contemporary English ▲

II. irregular² noun [countable]
a soldier who is not an official member of a country’s army

[TahlilGaran] Dictionary of Contemporary English ▲

irregular
adj.
I. not regular in size/shape/frequency
VERBS be, look | become
ADV. highly, very | rather, slightly, somewhat The cells are slightly irregular in shape.

[TahlilGaran] Collocations Dictionary ▲

irregular
II. not allowed according to the rules
VERBS be, seem, sound
ADV. highly, most, very It would be highly irregular for a police officer to accept money in this way.
slightly, somewhat some somewhat irregular business practices

[TahlilGaran] Collocations Dictionary ▲