Definitions
1.AdjectiveNonstandard; not conforming to rules or expectations.
2.AdjectiveOf a surface, rough.
3.AdjectiveWithout symmetry, regularity, or uniformity.
4.AdjectiveOf a polygon, not regular; having sides that are not equal or angles that are not equal.
5.AdjectiveOf a polyhedron, whose faces are not all regular polygons (or are not equally inclined to each other).
6.AdjectiveOf a word, not following the regular or expected patterns of inflection in a given language.""Calves", "cacti", and "children" are irregular plurals.; "To buy" is an irregular English verb: its past simple and past participle tense is "bought".; I hate learning all the irregular conjugations in French."
7.NounA soldier who is not a member of an official military force and who may not use regular army tactics.
8.NounOne who does not regularly attend a venue.