tau·tol·o·gytôˈtäləjē/nounthe saying of the same thing twice in different words, generally considered to be a fault of style (e.g., they arrived one after the other in succession ).synonyms:pleonasm, repetition, reiteration, redundancy, superfluity, duplication"avoid such tautology as "let's all work together, everyone, as a team" by saying simply "let's work together""a phrase or expression in which the same thing is said twice in different words.plural noun: tautologiesLOGICa statement that is true by necessity or by virtue of its logical form.