supercooled; supercooling; supercools
Definition of supercool
(Entry 1 of 2)
: to cool below the freezing point without solidification or crystallization
: to become supercooled
supercool
adjectiveDefinition of supercool (Entry 2 of 2)
: extremely cool: such as
a
: showing extraordinary reserve and self-control
b
: being the latest style or fashion
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
More Confusing Words—Quiz
-
- The magician
______
moved the selected card to the top of the deck.

Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share supercool
Time Traveler for supercool
The first known use of supercool was in 1904
See more words from the same year