Definition
This idiom refers to the state of being imprisoned indefinitely, with release contingent upon an official determination that it is safe to do so.
依聖裁决定監禁
He was held in prison at His Majesty's pleasure, indefinitely, pending further notice.
他被無限期地關押在監獄中，等待進一步的通知。
The offender was imprisoned at Her Majesty's pleasure, meaning he would be detained until the authorities deemed it safe to release him.
該罪犯被無限期監禁，意味著他將被拘留，直到當局認為釋放他是安全的。
She was sentenced to be detained at His Majesty's pleasure for several serious offenses, with no specified release date.
她因多項嚴重罪行被判無限期拘留，沒有具體的釋放日期。