a hidden storage space (for money or provisions or weapons)
(computer science) RAM memory that is set aside as a specialized buffer storage that is continually updated; used to optimize data transfers between system elements with different characteristics
the level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified
denoting confidence or intimacy; "a confidential approach"; "in confidential tone of voice"
(of information) given in confidence or in secret; "this arrangement must be kept confidential"; "their secret communications"
entrusted with private information and the confidence of another; "a confidential secretary"
resembling an oracle in obscurity of thought; "the oracular sayings of Victorian poets"; "so enigmatic that priests might have to clarify it"; "an enigmatic smile"
not clear to the understanding; "I didn't grasp the meaning of that enigmatic comment until much later"; "prophetic texts so enigmatic that their meaning has been disputed for centuries"