Adjective has 1 sense

• tautologic(s = adj.all) pleonastic, redundant, tautological - repetition of same sense in different words; "at the risk of being redundant I return to my original proposition"; "the phrase `a beginner who has just started' is tautological"; "`a true fact' and `a free gift' are pleonastic expressions"

Derived form noun tautology₂