What does "boil" mean?

Additional senses

1. 2.3. To pass from a liquid to an aëriform state or vapor when heated; as, the water boils away.
2. 3.To be moved or excited with passion; to be hot or fervid; as, his blood boils with anger. Then boiled my breast with flame and burning wrath. Surrey.
3. 4.To be in boiling water, as in cooking; as, the potatoes are boiling. To boil away, to vaporize; to evaporate or be evaporated by the action of heat. -- To boil over, to run over the top of a vessel, as liquid when thrown into violent agitation by heat or other cause of effervescence; to be excited with ardor or passion so as to lose self-control.
4. 5.To heat to the boiling point, or so as to cause ebullition; as, to boil water.
5. 6.To form, or separate, by boiling or evaporation; as, to boil sugar or salt.
6. 7.To subject to the action of heat in a boiling liquid so as to produce some specific effect, as cooking, cleansing, etc.; as, to boil meat; to boil clothes. The stomach cook is for the hall, And boileth meate for them all. Gower.
7. 8.To steep or soak in warm water. [Obs.] To try whether seeds be old or new, the sense can not inform; but if you boil them in water, the new seeds will sprout sooner. Bacon. To boil down, to reduce in bulk by boiling; as, to boil down sap or sirup.
8. 9.Act or state of boiling. [Colloq.]
9. 10.A hard, painful, inflamed tumor, which, on suppuration, discharges pus, mixed with blood, and discloses a small fibrous mass of dead tissue, called the core. A blind boil, one that suppurates imperfectly, or fails to come to a head. -- Delhi boil (Med.), a peculiar affection of the skin, probably parasitic in origin, prevailing in India (as among the British troops) and especially at Delhi.