This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Contrary to rule, accepted order, or general practice: irregular hiring practices.

adj. Not conforming to legality, moral law, or social convention: an irregular marriage.

adj. Not straight, uniform, or symmetrical: irregular facial features.

adj. Of uneven rate, occurrence, or duration: an irregular heartbeat.

adj. Deviating from a type; atypical.

adj. Botany Having differing floral parts, as of a zygomorphic or asymmetrical flower.

adj. Falling below the manufacturer's standard or usual specifications; imperfect.

adj. Grammar Departing from the usual pattern of inflection, derivation, or word formation, as the present forms of the verb be or the plural noun children.

adj. Not belonging to a permanent, organized military force: irregular troops.

n. One, such as an item of merchandise, that is irregular.

n. A soldier, such as a guerrilla, who is not a member of a regular military force.

adj. Nonstandard; not conforming to rules or expectations.

adj. Of a surface, rough.

n. A soldier who is not a member of an official military force and, often, does not follow regular army tactics.

adj. Not regular; not conforming to a law, method, or usage recognized as the general rule; not according to common form; not conformable to nature, to the rules of moral rectitude, or to established principles; not normal; unnatural; immethodical; unsymmetrical; erratic; no straight; not uniform

n. One who is not regular; especially, a soldier not in regular service.

Not regular; lacking regularity or method in some respect; not conformable to rule, order, symmetry, uniformity, or a fixed principle; deviating from the normal or usual course or state; devious; unmethodical; uneven: as, an irregular figure, outline, or surface; irregular verbs; irregular troops.

Not regular in action or method; not conformed or conforming to regular rules or principles; hence, disorderly; lawless; improper: as, he is given to irregular courses.

Specifically In human anatomy, being of no determinate shape, as a vertebra: said only of bones.

In zoology: Not having a definite form; bilaterally or radially unsymmetrical; not having the form usual in a group; differing in an unusual manner from neighboring parts: as, an irregular third joint of an insect's antenna.

Not arranged in a definite manner, or varying in position or direction: as, irregular marks (that is, marks varying in size or distance from one another); irregular punctures or striæ.

In echinoderms, not exhibiting radial symmetry; exocyclic or petalostichous; spatangoid or clypeastroid: specifically said of the heart-urchins and other sea-urchins of the division Irregularia. See cut under petalostichous.

In botany, not having all the members of the same part alike: said of flowers.

n. One who is not subject or does not conform to established regulations; especially, a soldier who is not in regular service, or a person practising medicine without belonging to the regular profession.

adj. independent in behavior or thought

adj. (used of the military) not belonging to or engaged in by regular army forces

adj. lacking continuity or regularity

adj. falling below the manufacturer's standard

adj. (of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement

adj. (of a surface or shape); not level or flat or symmetrical

n. a member of an irregular armed force that fights a stronger force by sabotage and harassment

adj. deviating from normal expectations; somewhat odd, strange, or abnormal

adj. not occurring at expected times

n. merchandise that has imperfections; usually sold at a reduced price without the brand name

adj. contrary to rule or accepted order or general practice

"After a preliminary sniff she embarked upon a rapid lecture on what she called my irregular and untidy habits."

unconventional    part-time    imperfect    uneven    unnatural    abnormal    sporadic    asymmetrical    strong    casual   

regular   

product    merchandise    ware   

irregular body    irregular antennæ    irregular indorsement    irregular cadence    irregular determinant   

irregular verb    irregular plural   

wild    devious    desultory    abnormal    inordinate    intemperate    unsystematic    crooked    uneven    immoderate   

regular   

rough    narrow    uneven    circular    jagged    smooth    uncertain    shallow    curious