1
general::
Phrase(s): all in one piece
Fig. safely; without damage. • Her son came home from school all in one piece, even though he had been in a fight. • The package was handled carelessly, but the vase inside arrived all in one piece.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, in one piece. Entirely undamaged or unharmed, as in Given all the airport delays and bad weather, we were glad to arrive all in one piece, or She was relieved when he returned from Nepal in one piece. [Early 1800s]
American Heritage Idioms