Definition - Repeating what has already been said.

1. This is usually considered a fault of either style or reasoning.

Example -
The free gift that they were giving away for free was quite a new innovation.

Etymology -
The word derives from the Late Latin tautologia, representation of the same thing. It ultimately derives from the Greek tauto, the same + logos, saying.

Oxford English Dictionary -
Its first citation is from 1579:
"It is a foolish tautologie, for you sayed the same immediately before."
(Fulke Confut. Sanders 644 )

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