LIQUID › If a liquid boils, or if you boil it, it reaches the temperature where bubbles rise up in it and it produces steam: I'll boil some water for a cup of tea. boiling water
CONTAINER › If a container of liquid boils, or if you boil it, the liquid inside it reaches the temperature where bubbles rise up in it and it produces steam: I've boiled the kettle.
COOK › to cook food in water that is boiling: Boil the pasta for 10 minutes.