What does "supercool" mean?

To cool a material below its transition temperature without that transition occurring.

What is a synonym for "supercool"?

Common synonyms include: supercooled, undercool, undercool.

Pronounced //ˈsuː.pəˌkuːl//.

//ˈsuː.pəˌkuːl// adj, verb, slang

adj, verb, slang ·Moderate ·College level

Verb

1
To cool a material below its transition temperature without that transition occurring.

Adjective

1
Very cool; thoroughly excellent, relaxed, or fashionable. informal
"On to how to access your Home folder from a remote Mac — a supercool feature that's only bound to get more popular as the Internet continues to mature."
2
Synonym of supercooled

"As Season 2 started, Dima decided that he needed a new look, and - reaching into the pocket of his Armani - pulled out a pair of supercool shades."

From super- + cool.

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