Definitions
There are 2 meanings of the phrase
Double Negative.
Double Negative - as a noun
An affirmative constructed from two negatives
Example: "Double negative such as 'a not unwelcome outcome'"
A grammatically substandard but emphatic negative
Example: "Double negative such as 'i don't never go'"
Example Sentences
"Using a double negative in a sentence can create confusion."
"Avoiding a double negative will make your sentence clearer."
"In standard English, double negatives are considered grammatically incorrect."
"The sentence 'I don't need no help' contains a double negative."
"She didn't say nothing about the party, which is a double negative."