a breach of rules, customs, etiquette, morality, etc.
4.
occasional mild constipation.
Origin
1275-1325;Middle Englishirregularite < Old French < Medieval Latinirrēgulāritās. See ir-2, regularity
Examples from the web for irregularity
Hence the humorous kernel inside that little irregularity during the oath.
Yet stand by the sea and watch the irregularity of its edge, and you begin to doubt.
Election observers found no evidence of serious irregularity.
So unless some sort of procedural irregularity has occurred during the trial any appeal has to be based on the judge's summing-up.
Whenever a fraud or financial irregularity occurs in a life insurance company the fact is a public calamity.
The gift they left later generations is a city of remarkable logic and beauty despite the irregularity of its land.
Avoid excessive exercise if it causes menstrual irregularity.
Caused by repeated friction and pressure from skin rubbing against bony areas or irregularity in a shoe.
The irregularity of this proceeding stirred up all the world against the usurper.
Much of the irregularity and general formal complexity of our declensional and conjugational systems is due to this process.
British Dictionary definitions for irregularity
irregularity
/ɪˌrɛɡjʊˈlærɪtɪ/
noun (pl) -ties
1.
the state or quality of being irregular
2.
something irregular, such as a bump in a smooth surface
3.
a breach of a convention or normal procedure
Word Origin and History for irregularity
n.
early 14c., "violation of Church rules," from Old French irregularité (14c.) and directly from Medieval Latin irregularitas, from irregularis (see irregular). Meaning "state of being not regular" is from 1590s.