circular definition
nounLogic.
a definition in which the definiendum (the expression being defined) or a variant of it appears in the definiens (the expression that defines it).
Words Nearby circular definition
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use circular definition in a sentence
This, however, is a circular definition: it assumes that we already know what is meant by 'known premisses'.
The Problems of Philosophy | Bertrand Russell
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