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lock someone or something away
to put someone or something away in a locked container or space. You will have to lock all the medications away when the grandchildren come to visit. They locked away some cash for a rainy day. They locked it away.
1. To put something in a locked space or container, especially for safekeeping: Fortunately, we had locked away most of our valuables before the burglary. I always lock my jewelry away in a safe.
2. To put someone in confinement, especially prison; incarcerate someone: After I threatened to jump off a building, they locked me away in the asylum. The secret police would lock away anyone who criticized the president.
3. To seclude oneself: I'm going to lock myself away and finish this book.