irregularity
🇺🇸
/ɪˌreɡjəˈlærəti/
🇬🇧
/ɪˌreɡjəˈlærəti/
Something that does not follow the usual rules or patterns.
The teacher noticed an irregularity in the pattern of the student's answers.
Something that does not happen regularly or as expected.
He experienced an irregularity in his sleep patterns that concerned him.
Something that is not even or smooth in shape or arrangement.
The irregularity on the surface made it difficult to paint evenly.