noun, noun which may take the genitive case particle 'no'
expiration; maturity; completion of term
Used for the end of a fixed period, such as a contract, insurance policy, prison sentence, or financial instrument. Often appears in compounds like 満期日 (maturity date) or 満期になる (to mature/expire).
保険が満期になったら、更新するかどうか考えます。
When the insurance matures, I'll consider whether to renew it.
定期預金の満期日は
The maturity date of the time deposit is the 15th of next month.
Compound of 満 (man, 'full') and 期 (ki, 'period'). The spelling is directly associated with the meaning of a term reaching its full period.