reserved

死刑囚の死刑執行が行われました。
Japan has hanged three death row inmates in its first executions since July 2010.

Reports said the unnamed prisoners, hanged in separate prisons, had all been convicted of multiple murders. Japan is one of the few advanced industrialised nations to retain the death penalty. It is usually reserved for multiple murders.
http://www.bbc.co.uk/news/world-asia-17545494

reservedは「予約」としてなじみのある言葉ですが、このようにも使われるのですね。これは"to keep in store for future or special use"という意味です。（GP）