ALL meanings of sub-zero
sub-ze·ro
S s - adjective sub-zero indicating or recording lower than zero on some scale, especially on the Fahrenheit scale: a week of sub-zero temperatures. 1
- adjective sub-zero characterized by or appropriate for sub-zero temperatures: sub-zero climates; sub-zero clothing for the exploration. 1
- adjective sub-zero temperature: below freezing 1
- adjective sub-zero Sub-zero temperatures are below 0° centigrade or, in the United States, below 0° Fahrenheit. 0