- the use of words that merely repeat elements of the meaning already conveyed, as in
the sentence Will these supplies be adequate enough? in place of Will these supplies be adequate?
- (logic) a statement that is always true, esp a truth-functional expression that takes the
value true for all combinations of values of its components, as in either the sun is out or the sun is not out . Compare inconsistency (sense 3, contingency (sense 5
Derived Forms tautological (ˌtɔːtəˈlɒdʒɪkəl
, or tauˈtologous adjective
ˌtautoˈlogically, or tauˈtologously adverb
Word Origin C16: from Late Latin tautologia, from Greek, from tautologos