retainerKK [rɪˋtenɚ] /ɹɪˈteɪnɚ/發音名詞1聘金、預付顧問費、委任費The law firm asked for a monthly retainer of two thousand dollars.那家律師事務所要求每月兩千元的聘金。2維持器、固定器牙科She has to wear a retainer at night for a year.她必須連續一年在晚上戴維持器。3家臣、僕從、隨從舊式The old lord was accompanied by two loyal retainers.那位老領主身邊跟著兩名忠心的家臣。4扣環、固定件機械A small metal retainer keeps the spring from slipping out.一個小金屬扣環可防止彈簧滑出。