tau·tol·o·gy /tɔːˈtɒlədʒi $ tɒːˈtɑː-/ noun (plural tautologies) [countableC, uncountableU] technical RPa statement in which you say the same thing twice using different words in a way which is not necessary, for example, ‘He sat alone by himself.’ 同义反复,赘述 → redundant —tautological /ˌtɔːtəˈlɒdʒɪkəl◂ $ ˌtɒːtəˈlɑː-/ (also tautologous /tɔːˈtɒləɡəs $ tɒːˈtɑː-/) adjectiveadj