1. to cool a liquid below its normal freezing point without it becoming solid
Usage: physics; chemistry

Examples

• Scientists can undercool water to several degrees below freezing.
• The laboratory undercooled the solution to study crystallization.
• When you undercool a liquid, it remains in liquid state despite being below its freezing point.
• The researchers undercooled the metal alloy for their experiment.
• It’s possible to undercool pure water to -40°C under controlled conditions.