secreter n any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream s not open or public; kept private or not revealed s conducted with or marked by hidden aims or methods s not openly made known s communicated covertly s not expressed s designed to elude detection s hidden from general view or use s (of information) given in confidence or in secret s indulging only covertly s having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding s the next to highest level of official classification for documents Synonym(s) gland secretory organ secretor secret clandestine cloak-and-dagger hole-and-corner hugger-mugger hush-hush surreptitious undercover underground unavowed private hidden privy secluded confidential mysterious mystic mystical occult orphic