Legal Definition
An annum is a period of one year, often used to denote a yearly term or duration in legal contexts. In contract law, it signifies a full 12-month period for calculation, interest accrual, or the duration of a lease or agreement.
Plain-English Translation
Imagine 'annus' as a way to say 'one year.' In law, it means a full twelve-month period, like one whole year. It helps define how long something lasts or how much time passes for interest calculations.