Added 9 October 2026 cognisance noun Categories: Mind & IdeasRare Words noun ! Definition from WordNet 3.1, Princeton University. More about cognisance at Wordnik → Where our words come from → Having knowledge of. he had no awareness of his mistakes Related Words: understandingknowledgeawarenessconsciousnessconsciencefamiliaritynoteacquaintanceaccountcognizancecognisantcognize Back to today's word