n.

1. 不规则；不平整；不整齐[U]
   the irregularity of the coastline

   海岸线的曲曲折折

2. 不规则的事物；不平整的东西[C][P1]
   the irregularities of the earth's surface

   地球表面的凹凸不平

3. 不正当的行为；违法行为；品行不端[C][P1][U]
   He couldn't explain the irregularities in the balance sheet, and I suspect him of taking the money.

   他无法解释资产负债表中的不正常的情况，我怀疑他把钱放进自己腰包了。