septic tank septic sore throat • septier · · · Info · Definitions · Characters · · septic tank · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) large tank where solid matter or sewage is disintegrated by bacteria. Synonyms: septic tank. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 k latin small letter k U+006B n latin small letter n U+006E p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074