1. Knowledge, awareness, or notice of something.
Usage: British spelling; American spelling is 'cognizance'; Often used in the phrase 'take cognisance of'
2. The right or power of a court to hear and decide a case.
Usage: Legal term; British spelling; American spelling is 'cognizance'

Examples

• The manager took cognisance of the employee's concerns and addressed them promptly.
• We must take cognisance of the changing market conditions.
• The court has cognisance over disputes involving contracts.
• She brought the issue to his cognisance during the meeting.
• The judge determined that the court had cognisance of the matter.
• Without cognisance of the facts, it is difficult to make a fair decision.