it refers to the act of the president of staying the execution of a convict
Stay of execution In cases where the death penalty has been imposed, a stay of execution is often sought to defer the execution of the convicted person. This may occur if new evidence is discovered that will exonerate the convicted person or in attempts to have the sentence commuted to life imprisonment. In the United States, all death sentences are automatically stayed pending a direct review by an appeals court. If the death sentence is found to have been legally sound, the stay is lifted.
Capital punishment for juveniles in the United States The youngest person to be executed in the 20th century was George Stinney, electrocuted in South Carolina at the age of 14 on June 16, 1944. The second youngest person to be executed in the 20th century was Fortune Ferguson in 1927 for rape in Florida. The youngest person ever to be sentenced to death in the United States was James Arcene, a Native American, for his role in a robbery and murder committed when he was ten years old. He was, however, 23 years old when he was actually executed on June 18, 1885.[1] The last execution of a juvenile was convicted murderer Leonard Shockley, who died in the Maryland gas chamber on April 10, 1959, at the age of 17. No one has been under the age of 19 at the time of execution since at least 1964.[2][3]