/ˌɛkspɪˈreɪʃən/ – noun
Definition: sự kết thúc, sự mãn hạn, sự hết hạn, sự hết hiệu lực.
A more thorough explanation: Expiration refers to the termination or end of a legal agreement, contract, license, or other legal document, typically due to the passage of a specified period of time or the occurrence of a specific event as outlined in the document.
Example: The expiration date of the contract is set for December 31st.