- indicating or recording lower than zero on some scale, especially on the Fahrenheit scale: a week of sub-zero temperatures.
- characterized by or appropriate for sub-zero temperatures: sub-zero climates; sub-zero clothing for the exploration.
Origin of sub-zero
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for subzero
A runaway teen hitched a ride in the wheel well of a plane that reached 38,000 feet and subzero temperatures.How to Hitchhike a Plane—and Survive
April 22, 2014
I found it emotionally and physically draining because sometimes we filmed in subzero conditions in New York.Costarring With Dinosaurs
Maria Elena Fernandez
September 26, 2011
Silicones for motor insulation and subzero lubricants—used in new glassmaking techniques for myriad products.The Practical Values of Space Exploration
Committee on Science and Astronautics
- (esp of temperature) lower or less than zero