irregular
ir‧reg‧u‧lar1 /ɪˈreɡjələ, ɪˈreɡjʊlə $ -ər/ 
adjective
SYN uneven
OPP 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
OPP 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
OPP 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’
OPP 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.
irregular2 noun [countable]
a soldier who is not an official member of a country’s army
| I |
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 SYN uneven
OPP regular:
2. not happening at times that are an equal distance from each other
OPP regular:
3. not happening or done at the normal time for doing something
OPP regular:
4. formal not obeying the usually accepted legal or moral rules:
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’
OPP 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]:
| II |
noun [countable]a soldier who is not an official member of a country’s army