Added 9 October 2026 strictness noun Categories: Describing WordsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about strictness at Wordnik → Where our words come from → Conscientious attention to rules and details. Uncompromising resolution. Related Words: stringencysternnessstringentausterityrigourrigorstiffnessrigidtoughnessfirmnesshardeningrigidity Back to today's word