tautological Definition

tautology
noun tautologies

1. The use of words which repeat the meaning found in other words already used, as in I myself personally am a vegetarian.

Thesaurus: repetition, duplication, redundancy, repetitiveness, superfluity, pleonasm; Antonym: succinctness, economy.
2. logic.
A statement which is necessarily always true.

Derivative: tautological
adj

Characterized by tautology
Thesaurus: redundant, repetitive, superfluous, self-evident, pleonastic; Antonym: concise.

Derivative: tautologically
adverb

Etymology: 16c: from Greek tautologos, from tauto same + legein to say.