the fact of making sure that nothing is known about something; the state of being secret the need for absolute secrecy in this matter Everyone involved was sworn to secrecy. The whole affair is still shrouded in secrecy. Word Origin late Middle English: from secret, probably on the pattern of privacy.Extra examples All the researchers on the project are sworn to absolute secrecy. The Ministry of Defence must answer for its culture of secrecy. The drugs squad operates in the greatest secrecy. The organization has managed to maintain secrecy about its activities. Everyone involved was sworn to secrecy.