Definitions for irregular
ɪˈrɛg yə lərir·reg·u·lar

guerrilla, guerilla, irregular, insurgent(noun)
a member of an irregular armed force that fights a stronger force by sabotage and harassment
irregular, second(adj)
merchandise that has imperfections; usually sold at a reduced price without the brand name
irregular(adj)
contrary to rule or accepted order or general practice
"irregular hiring practices"
irregular, unpredictable(adj)
not occurring at expected times
irregular(adj)
(used of the military) not belonging to or engaged in by regular army forces
"irregular troops"; "irregular warfare"
irregular(adj)
(of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement
irregular(adj)
falling below the manufacturer's standard
"irregular jeans"
atypical, irregular(adj)
deviating from normal expectations; somewhat odd, strange, or abnormal
"these days large families are atypical"; "atypical clinical findings"; "atypical pneumonia"; "highly irregular behavior"
irregular, temporary(adj)
lacking continuity or regularity
"an irregular worker"; "employed on a temporary basis"
irregular(adj)
(of a surface or shape); not level or flat or symmetrical
"walking was difficult on the irregular cobblestoned surface"
irregular, maverick, unorthodox(adj)
independent in behavior or thought
"she led a somewhat irregular private life"; "maverick politicians"

irregular(Noun)
A soldier who is not a member of an official military force and, often, does not follow regular army tactics.
irregular(Adjective)
Nonstandard; not conforming to rules or expectations.
irregular(Adjective)
Of a surface, rough.

Origin: From irreguler, from irregularis, from in- + regularis.

Irregular(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; as, an irregular line; an irregular figure; an irregular verse; an irregular physician; an irregular proceeding; irregular motion; irregular conduct, etc. Cf. Regular
Irregular(noun)
one who is not regular; especially, a soldier not in regular service

Irregular
ir-reg′ū-lar, adj. not according to rule: unnatural: unsystematic: vicious: (gram.) departing from the ordinary rules in its inflection: variable: not symmetrical, without regular form—(Shak.) Irreg′ulous.—n. a soldier not in regular service.—n. Irregular′ity, state of being irregular: deviation from a straight line, or from rule: departure from method or order: vice.—adv. Irreg′ularly.

irregular
Not regular; not according to common form or rules; as, an irregular building or fortification. See Fortification, Irregular.

Chaldean Numerology
The numerical value of irregular in Chaldean Numerology is: 7
Pythagorean Numerology
The numerical value of irregular in Pythagorean Numerology is: 1

Donald Tusk:
The days of irregular migration to Europe are over.
Donald Tusk:
The days of irregular migration to the European Union are over.
Willa Cather:
The irregular and intimate quality of things made entirely by the human hand.
Bill Taylor:
Irregular policy channels were running contrary to longstanding goals of U.S. policy.
Paula Donovan:
At the very least, this irregular contract extension has the appearance of impropriety.