–adjective
3.
1.
done, made, or conducted without the knowledge of others: secret negotiations.
2.
kept from the knowledge of any but the initiated or privileged: a secret password.
3.
faithful or cautious in keeping confidential matters confidential; close-mouthed; reticent.
4.
designed or working to escape notice, knowledge, or observation: a secret drawer; the secret police.
5.
secluded, sheltered, or withdrawn: a secret hiding place.
6.
beyond ordinary human understanding; esoteric.
7.
(of information, a document, etc.)
a.
bearing the classification secret.
b.
limited to persons authorized to use information documents, etc., so classified.
–noun
8.
8.
something that is or is kept secret, hidden, or concealed.
9.
a mystery: the secrets of nature.
10.
a reason or explanation not immediately or generally apparent.
11.
a method, formula, plan, etc., known only to the initiated or the few: the secret of happiness; a trade secret.
12.
a classification assigned to information, a document, etc., considered less vital to security than top-secret but more vital than confidential, and limiting its use to persons who have been cleared, as by various government agencies, as trustworthy to handle such material. Compare classification ( def. 5 ) .
—Idiom
14.
in secret, unknown to others; in private; secretly: A resistance movement was already being organized in secret.
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The next time you need to tell someone your little secret, make sure that person doesn’t tell you that you need to BACK UP your SECRET.

) Liturgy . a variable