/ˌɪnvəˈlɪdəti/ – Noun
Definition: 1. tình trạng không còn giá trị pháp lý, tình trạng không có hiệu lực phap lý;
2. tình trạng tàn tật.
A more throughout explanation: Invalidity refers to the state of being legally void or not legally recognized. It can refer to a situation where something is not valid or legally binding, such as a contract, agreement, or decision. Invalidity can arise due to various reasons, such as a lack of legal capacity, a violation of laws or regulations, or a failure to meet certain legal requirements.
Example: The court ruled that the contract was void due to the invalidity of the signatures.