A violation of rules.
An object or event that is not regular or ordinary.
An instance of being irregular.
Irregular bowel movement (e.g. diarrhea or constipation).
The state or condition of being irregular, or the extent to which something is irregular.
The synthesis of theory and practice, without presuming the primacy of either.
The deliberate action of a rational being.
Custom or established practice.
An example or form of exercise, or a collection of such examples, for practice.
The practical application of any branch of learning.