a statement in which you say the same thing twice in different words, when this is unnecessary, for example “They spoke in turn, one after the other.”
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NAmE//ˌtɔt̮lˈɑdʒɪkl//
adjective NAmE//tɔˈtɑləɡəs//
adjectiveSee tautology in the Oxford Advanced Learner's DictionaryCheck pronunciation: tautology