irregularity

noun
UK /ɪˌreɡjəˈlærəti/
US /ɪˌreɡjəˈlærəti/

An irregularity is something that is not normal or not the same as the rest.

The teacher noticed an irregularity in the pattern of the tiles.


OTHER MEANINGS

2. A small problem or fault in something that should be smooth or regular.

The doctor found a slight irregularity in his heartbeat.

3. The state of not following the usual rules or order.

The referee reported an irregularity in the game's scoring.

4. A bump or uneven spot on a surface.

There was an irregularity on the road that made the car bounce.