Definition of "supercool"

supercool

verb
third-person singular simple present supercools, present participle supercooling, simple past and past participle supercooled
1. (physics) To cool a material below its transition temperature without that transition occurring
adjective
comparative more supercool, superlative most supercool
1. (informal) Very cool; thoroughly excellent, relaxed, or fashionable.
  Quotations
  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.
  2009, Bob LeVitus, Mac OS X Snow Leopard For Dummies, page 323