1
used (ticket, stamp, etc.);spent (fuel, battery, etc.)
1
arranged;taken care of;settled;completed;finished
pronounced ずみ only when a suffix
鍵のいらない暗証タイプには、お好きな番号を設定できるフリーダイヤル式と、あらかじめ番号が設定済みの固定式とがあります。
For code-type locks that don't need a key, there are 'free dial' systems where you can set any number you like, and fixed types where the number is set in advance.
Other forms
済 【ずみ】 (irregular okurigana usage)