Added 9 October 2026 informality noun Categories: Describing WordsRare Words noun ! Definition from Wiktionary (CC BY-SA). More about informality at Wordnik → Where our words come from → The condition of being informal. An informal term or usage; a colloquialism. Related Words: easesimplesimplicityinsecurityprecariousnesscasualnesscolloquialitysemiformalitycolloquialnessformalityunformalizabilityunofficialness Back to today's word