irregular🔊

Nonstandard; not conforming to rules or expectations.

Rough (of a surface).

Without symmetry, regularity, or uniformity.

(geometry, of a polygon) Not regular; having sides that are not equal or angles that are not equal.

(geometry, of a polyhedron) Whose faces are not all regular polygons (or are not equally inclined to each other).

(grammar, of a word) Not following the regular or expected patterns of inflection in a given language.

A soldier who is not a member of an official military force and who may not use regular army tactics.

One who does not regularly attend a venue.