to lie dead peacefully for eternity. (A solemn entreaty used in funeral prayers, eulogies, etc.) We prayed that the deceased would rest in peace. The bodies of the soldiers will rest in peace.
to be free from trouble The late Mr. Aspin, may he rest in peace, was a good friend to all of us.The girl is dead. Why can't you stop criticizing and let her rest in peace?
Usage notes: always used in reference to a dead person