ಅರ್ಥ : (logic) a statement that is necessarily true.
ಉದಾಹರಣೆ :
The statement `he is brave or he is not brave' is a tautology.
ಅರ್ಥ : Useless repetition.
ಉದಾಹರಣೆ :
To say that something is `adequate enough' is a tautology.