American English
/iˈɹɛ.gjə.lɚ/
4 syllables · Stress the second syllable.
Not following a usual pattern, rule, or schedule; not even or uniform.
Practice out loudNot following a usual pattern, rule, or schedule; not even or uniform.
The bus service is irregular on Sundays.
The stone has an irregular shape.
irregular schedule · irregular pattern · irregular shape · irregular hours
an irregular + noun
irregular in + noun
In grammar, not changing in the usual way to show the past or another form.
Go is an irregular verb.
Went is the irregular past form of go.
An irregular verb does not usually add -ed to make its past form: go → went.
irregular verb · irregular form
an irregular + noun
an irregular verb
not at regular or fixed times
The buses arrive at irregular intervals.
working or opening times that change or are not fixed
The clinic has irregular hours this week.
a verb whose forms do not follow the usual pattern
Eat is an irregular verb: eat, ate, eaten.