in petto

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in pet·to

 (ĭn pĕt′ō)
adv. & adj. Roman Catholic Church
In secret or private. Used of appointments of cardinals by the pope undisclosed in consistory.

[Italian : in, in + petto, breast.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

in petto

(ɪn ˈpɛtəʊ)
(Roman Catholic Church) RC Church not disclosed: used of the names of cardinals designate
[Italian, literally: in the breast]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

in pet•to

(inˈpɛt tɔ)

adv., adj. Italian.
(of cardinals whom the pope appoints but does not disclose in consistory) in secret or private; not disclosed.
[literally, in (the) breast]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in classic literature ?
Still they may entitle him to have this VETO, in petto."
13, 2003) consistently refers to him as a "former chancellor of the diocese of Rochester," which he has not been, unless in petto. Thus, perhaps the headline of the Oct.