Longman Dictionary of Contemporary English
Wiktionary
a. (context of a temperature English) below 0°C; freezing cold
Wikipedia
Sub-Zero is a video game character from the Mortal Kombat series and one of the original characters in the first Mortal Kombat game in 1992. A mainstay of the series, Sub-Zero is the only character who has appeared in every main Mortal Kombat fighting game. The character also appears in many other Mortal Kombat media works such as the Mortal Kombat live action film series and animated series.
The character is a formidable fighter possessing the innate ability to control ice in many forms. In his first return appearance in Mortal Kombat II, it was revealed that the original Sub-Zero had died during the events of the first game and was replaced by his younger brother. In subsequent games, the younger brother remained as Sub-Zero, while the elder brother became Noob Saibot. The most defining trait of the character is his fierce rivalry with his nemesis Scorpion.
Sub-Zero is a brand of residential major kitchen appliances including refrigeration and wine preservation products built in the USA by the Sub-Zero Freezer Company, Inc. The company also manufactures kitchen appliances under the Wolf brand name.
Usage examples of "sub-zero".
Bettik and I walk slowly north along the narrow ice ridge, clipping on to fixed cables to keep from being blown away by the sub-zero winds that hurtle down from the jet stream now.
Worse still, the sub-zero wind lanced like a thousand stilettos through the saturated clothing of a man who had been submerged in the sea, and the heart, faced with an almost instantaneous 100° change in body temperature, just stopped beating.
Two hours, the Captain took to his inspection, two hours of constant walking, of climbing over storm-sills and tangled wreckage of steel, of squeezing and twisting through impossibly narrow apertures, of climbing and descending a hundred ladders, two hours of exhausting torture in the bitter, heart-sapping cold of a sub-zero temperature.
But he laid hold of the handle and the door opened, and suddenly, miraculously, he was outside, gasping as the cruel, sub-zero wind seared down through his throat and wasted lungs.
Only the snow was real, the snow and that bone-deep, sub-zero cold that shrouded him from head to toe in a blanket of ice and continuously shook his entire body in violent, uncontrollable spasms of shivering, like a man suffering from ague.
The wind had dropped, not the slightest zephyr stirring across the great plains, and the silence everywhere was profound with that frozen stillness that comes only with a sub-zero dawn and the snow lying deeply across the land.
Fifteen minutes, perhaps twenty, had elapsed since Sandor had plunged into that freezing river, and most of the time since then he had spent out in the sub-zero cold.
It had been a close thing, far too close a thing, for in far sub-zero temperatures with a gale-force wind blowing, even a few seconds' submersion in water makes the certainty of death absolute, the process of dissolution as swift as it is irreversible.
In far sub-zero temperatures, there is one thing that the Eskimo avoids as he would the plague--overexertion, in those latitudes more deadly, even, than the plague itself.
Only two things don't freeze solid in those sub-zero temperatures--alcohol and gasoline.
The shuffling of boots had crushed and melted it, but then the sub-zero temperatures had refrozen it into an invisible, paper-thin skim of ice.
Physically he was far out in the comfortably sub-zero reaches of the stratosphere, but his mind was en rapport with theirs.