What does cognisance mean?
Cognisance is a formal noun meaning awareness, knowledge, or notice of something. To 'take cognisance of' a fact is to acknowledge it and factor it into one's judgement, making the word a staple of legal, governmental, and administrative prose. In law it carries an additional, older sense: cognisance can denote the proper jurisdiction or scope of authority within which a court may act on a matter. The word derives from Old French conoissance, ultimately from Latin cognoscere, 'to come to know', tying it to the family of cognition words such as cognitive and recognise. Though somewhat old-fashioned outside professional contexts, cognisance remains useful precisely because it signals deliberate, considered attention rather than casual noticing — a nuance plainer words like 'awareness' do not convey.
Knowledge, awareness, or formal notice of something.
"She took careful cognisance of every objection raised during the hearing."
Almost always used with 'take' or 'have'; rare as a standalone noun.
The scope of a court's jurisdiction or its formal recognition of a matter.
"The dispute fell outside the tribunal's cognisance."
A specialised sense retained chiefly in legal contexts.
Rarely pluralised; the word is almost always used as an uncountable mass noun referring to awareness or jurisdiction.
"The records listed the heraldic cognisances adopted by successive lords."
In law, courts don't just hear cases — they take 'cognisance' of them, a word borrowed straight from Norman French that still carries the weight of official jurisdiction.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cognisance
Cognisance comes from Old French conoissance ('knowledge, acquaintance'), derived from the verbconoistre, itself from Latin cognoscere, 'to get to know'. It entered English in the Middle English period via Anglo-Norman legal usage, which explains its enduring association with courts and jurisdiction. Its Latin root also gives English cognition, recognise, and connoisseur, all built on gnoscere, 'to know'.
Related word forms
How cognisance is actually used
Formal register, common in legal, administrative, and official British writing; typically appears in the phrase 'take cognisance of'. American English prefers the spelling 'cognizance'.
Easily confused with cognisance
Cognisance means knowledge or awareness of a fact, whereas conscience is the inner moral sense that distinguishes right from wrong.