Added 10 October 2026 premiss noun Categories: LanguageRare Words noun ! Definition from Wiktionary (CC BY-SA). More about premiss at Wordnik → Where our words come from → Alternative spelling of premise. verb Alternative spelling of premise. Related Words: assumptionthesispropositionpremissessyllogismpresuppositionreasoningpostulationapodicticpostulateargumententhymeme Back to today's word