Simple Definition of subfreezing
: colder than the temperature at which water freezes : colder than 32°F or 0°C
Full Definition of subfreezing
: being or marked by temperature below the freezing point (as of water) <subfreezing weather>
First Known Use of subfreezing
Seen and Heard
What made you want to look up subfreezing? Please tell us where you read or heard it (including the quote, if possible).