- (of a quadratic form) positive for all real values of the variables, where the values are not all zero.
- (of a matrix) displaying the coefficients of a positive definite quadratic form.

## Origin of positive definite

First recorded in 1905–10

Related formspositive definiteness, nounDictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018