sub rosa

adv

confidentially, in confidence, just between you and me, just between the two of us, just between you and me and the lamppost, entre nous, Latin, inter nos; off the record, unofficially; secretly, in secret, softly, sotto voce, in a whispered voice, in a hush-hush manner; privately, in private, aside, alone, exclusively; behind closed doors, Law. in camera, out of view, off-camera, in seclusion; obscurely, recondite-ly, occultly, mysteriously; covertly, clandestinely, surreptitiously, furtively; on the sly, stealthily, sneakily, sneakingly, underhandedly, under-the-table, under-the-counter, through the back door, illicitly, illegally.