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- DictionarySub ro·sa/ˌsəb ˈrōzə/
adjective
- 1. happening or done in secret: "sub rosa inspections"
adverb
- 1. in secret: "the committee operates sub rosa"
adjective
adverb
The Latin phrase sub rosa (Neo-Latin for "under the rose"), denotes secrecy or confidentiality and is used in English to denote secrecy or confidentiality, similar to the Chatham House Rule. The rose has a long, ancient history as a symbol of secrecy. Wikipedia