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.”
NAmE//ˌtɔt̮lˈɑdʒɪkl//
adjective NAmE//tɔˈtɑləɡəs//
adjectiveSee tautology in the Oxford Advanced Learner's DictionaryCheck pronunciation: tautology