- (of atmospheric conditions) having or characterized by zero visibility in both horizontal and vertical directions.
Origin of zero-zero
First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for zero-zero
What gives you a zero-zero adjustment index that nothing can shake?
He'd become a perfectly adjusted specimen with a zero-zero index, but—he'd also become a human robot with no will of his own.
Hadn't he survived a decade of frontier conflict with an adjustment index of zero-zero?