Added 10 October 2026 unregularity noun Categories: Describing WordsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about unregularity at Wordnik → Where our words come from → Not characterized by a fixed principle or rate; at irregular intervals. Related Words: irregularityirregularirregularitiesirregularlyabnormalityunevennessunsymmetricalanomalousnessnonuniformityunsystematicungrammaticality Back to today's word