out of N
The 'prison' groupThese nouns refer to places.
This use is very productive. The pattern is used with noun groups referring to places of many kinds, for example out of the country and out of their homes.
out of bed out of college out of court out of hospital out of jail out of prison out of school out of town
I'd like to put it all behind me, but I've achieved nothing since I came out of prison.
I was out of town at the time, so I don't know exactly how it happened.