Main entry: mystery, closed book, enigma, secret
Definition: something that baffles understanding and cannot be explained
Usage: how it got out is a mystery; it remains one of nature's secrets
Definition: information known only to a special group
Usage: the secret of Cajun cooking
Main entry: secret
Definition: something that should remain hidden from others (especially information that is not to be passed on)
Usage: the combination to the safe was a secret; he tried to keep his drinking a secret
Definition: not openly made known
Usage: a secret marriage; a secret bride
Main entry: secret
Definition: the next to highest level of official classification for documents
Main entry: secret, occult, orphic, mysterious, mystic, mystical
Definition: having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding
Usage: mysterious symbols; the mystical style of Blake; occult lore; the secret learning of the ancients
Definition: not expressed
Usage: secret (or private) thoughts
Main entry: secret, undercover, underground, surreptitious, hole-and-corner, hugger-mugger, hush-hush, clandestine, cloak-and-dagger
Definition: conducted with or marked by hidden aims or methods
Usage: clandestine intelligence operations; cloak-and-dagger activities behind enemy lines; hole-and-corner intrigue; secret missions; a secret agent; secret sales of arms; surreptitious mobilization of troops; an undercover investigation; underground resistance
Main entry: secret
Definition: indulging only covertly
Usage: a secret alcoholic
Main entry: secret
Definition: communicated covertly
Usage: their secret signal was a wink; secret messages
Main entry: confidential, secret
Definition: (of information) given in confidence or in secret
Usage: this arrangement must be kept confidential; their secret communications
Main entry: privy, secluded, secret
Definition: hidden from general view or use
Usage: a privy place to rest and think; a secluded romantic spot; a secret garden
Definition: designed to elude detection
Usage: a hidden room or place of concealment such as a priest hole; a secret passage; the secret compartment in the desk
Main entry: secret
Definition: not open or public; kept private or not revealed
Usage: a secret formula; secret ingredients; secret talks