1. Plural of cognisance; knowledge, awareness, or acknowledgment of something.
Usage: Chiefly British spelling; American English typically uses 'cognizance'.; Often used in the phrase 'take cognisance of' meaning to acknowledge or become aware of.
2. In law, the right or power of a court to hear and decide a case; jurisdiction.
Usage: Legal/formal term; Chiefly British spelling.
3. In heraldry, a distinctive badge or emblem worn or displayed as a sign of allegiance or office.
Usage: Heraldic term; Archaic or specialized usage

Examples

• The committee took cognisances of the new safety regulations.
• The court's cognisances extended to all civil disputes in the district.
• Medieval nobles displayed their cognisances on shields and banners.
• We must bring these issues to the attention of those in cognisances.
• The judge asserted the court's cognisances over the matter.