adj.
Pronunciation: to ̇ - ' tä-l ə -g ə s
Function: adjective
Etymology: Greek tautologos, from taut- + legein to say ― more at LEGEND
Date: 1714
1 : involving or containing rhetorical tautology : REDUNDANT
2 : true by virtue of its logical form alone
– tau · tol · o · gous · ly adverb