clandestine operation clandestine • clandestinely · · · Info · Definitions · Characters · · clandestine operation · · Text Common · · Latin · · Scripts 21 · · Length 7 · · Syllables Definitions · · · (noun) an intelligence operation so planned and executed as to insure concealment. Synonyms: clandestine operation. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074