rhizoverbBeta
DictionaryirregularOutside the usual pattern
adjective / noun

irregular

ih-REG-yuh-ler/ɪˈreɡjələr/

Outside an established regular pattern or organization.

The fence posts have irregular gaps and uneven heights.

A row of seven upright fence posts has conspicuously uneven gaps and unequal heights, irregular pattern obvious; isolated objects, no landscape.
Etymology
irLatinnot
+regularLatinhaving rules

Regularis concerned rules for guidance, so its negative initially described failure to conform to Church rules. The meaning broadened to departures from rules generally, including predictable patterns and schedules.

In context

Professor Dave Explains6:55
Such impressions can be a combination of loops, whorls, or arches. They are irregular and their formation is a result of pure chance, found in only 1-3% of all observed fingerprint patterns.
Types of Fingerprint Patterns

More examples

  • Her irregular work schedule makes planning difficult.
  • The doctor checks his irregular heartbeat.
  • Local irregulars fight alongside the regular army.

Forms

irregular · more irregular · most irregular · irregulars

irregularity noun — A departure from a regular pattern.

irregularly adverb — Without a consistent pattern or schedule.

Similar words

uneven
Emphasizes differences in height, spacing, amount, or quality.
inconsistent
Emphasizes failure to stay the same across occasions.
guerrilla
Specifically a fighter using raids and surprise attacks.