in pet·​to | \ in-ˈpe-(ˌ)tō How to pronounce in petto (audio) \

Definition of in petto

1 : in private : secretly
2 : in miniature

First Known Use of in petto

1647, in the meaning defined at sense 1

History and Etymology for in petto

Italian, literally, in the breast

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The first known use of in petto was in 1647

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