Entry 1 sense Webster, 1913

Irregularity

/ĭrˌ-ĕgˌ-yəl-ĕr'-ət-ē/ · Ir·reg·u·lar·i·ty · IPA /ɪˌɹɛ.ɡjʊˈlæ.ɹɪ.ti/

01 n. The state or quality of being irregular; that which is irregular.

pl. Irregularities ((#))