/ ˌregjuˈlærəti; NAmE / noun
1.
[ U ] the fact that the same thing happens again and again, and usually with the same length of time between each time it happens :
Aircraft passed overhead with monotonous regularity .
2.
[ U ] the fact that sth is arranged in an even way or in an organized pattern :
the striking regularity of her features
3.
[ C ] a thing that has a pattern to it :
They had observed regularities in the behaviour of the animals.
—compare irregularity