What does "subzero" mean?

Less than zero, most commonly used to refer to temperature.

What is a synonym for "subzero"?

Common synonyms include: algid, arctic, below zero, biting, bitter, bitterly cold.

Subzero

adj

adj ·3 syllables ·Uncommon ·Advanced level

Definitions

Adjective

1
Less than zero, most commonly used to refer to temperature. not-comparable

Synonyms

All synonyms

algid arctic below zero biting bitter bitterly cold

Example

More examples

"Known as America’s “Last Frontier,” Alaska conjures up thoughts of polar bears, subzero temperatures and expansive areas of little-explored terrain around the Arctic Circle."

Etymology

From sub- + zero.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.