irregular

About 10.86 uses per million words.

Meaning

1. adjective Nonstandard; not conforming to rules or expectations.
2. adjective Of a surface, rough.
3. adjective Without symmetry, regularity, or uniformity.
4. adjective Of a polygon, not regular; having sides that are not equal or angles that are not equal.
5. adjective Of a polyhedron, whose faces are not all regular polygons (or are not equally inclined to each other).
6. adjective Of a word, not following the regular or expected patterns of inflection in a given language.

   "Calves", "cacti", and "children" are irregular plurals.

7. adjective Having abnormal bowel movements at inconsistent intervals.
8. noun A soldier who is not a member of an official military force and who may not use regular army tactics.

Similar words

unconventional atypical unorthodox unpredictable uneven asymmetrical improper arrhythmic abnormal unlawful

Often followed by

and in intervals shape or verbs surface shapes manner

Word family

irregularly irregulars