- to cool (a liquid) below its freezing point without producing solidification or crystallization; undercool.
- to become supercooled.
- very cool in temperature, especially of the maximum coolness possible: used as a setting on air conditioners.
- very cool; very sophisticated, up-to-date, unemotional, etc.
- to cool or be cooled without freezing or crystallization to a temperature below that at which freezing or crystallization should occur. Supercooled liquids are not in equilibrium
