Maturity is the state of being fully developed or adult.
例句
Humans experience a delayed maturity; we arrive at all stages of life later than other mammals.人類發育較緩——在生命的各個階段，我們都晚于其他哺乳動物。
N-UNCOUNT
(性格、行為等的)成熟
Someone's maturity is their quality of being fully developed in their personality and emotional behaviour.
例句
Her speech showed great maturity and humanity...她的演講非常老練，極富人情味。Lacking self-confidence and maturity, many teenagers are left feeling very vulnerable.許多十幾歲的孩子既缺乏自信又不夠懂事，所以感情上十分脆弱。
N-VAR
(存單、養老金計劃等的)到期
When an investment such as a savings policy or pension plan reaches maturity, it reaches the stage when you stop paying money and the company pays you back the money you have saved, and the interest your money has earned.
例句
Customers are told what their policies will be worth on maturity...客戶被告知保險單到期時的價值。Treasury bonds have maturities that extend out as far as 25 years or more.國庫券的到期時間長達25年甚至更久。