Definitions

1. adjective

of or relating to a statement or expression that asserts something to be true by virtue of its own form or structure, rather than by its literal meaning.

“The philosopher’s tautologic statement that ‘all bachelors are unmarried’ is a classic example of this linguistic phenomenon.”

2. noun

a tautologic statement or expression.

“The professor’s lecture was full of tautologic examples that failed to convey any meaningful insight.”