From Longman Dictionary of Contemporary Englishboiling pointˈboiling point noun [countable usually singular] 1 TMthe temperature at which a liquid boils2 CONTROLa point where people can no longer deal calmly with a problem → flashpoint Relations between the two countries have almost reached boiling point.
Examples from the Corpus
boiling point• Tensions in the neighborhood reached a boiling point.• The colligative properties are boiling point, freezing point, osmotic pressure, and vapor pressure.• This is the boiling point of water at one atmosphere.• That leaves ethanol molecules free to escape at temperatures lower than the boiling point of water.• When boiling point is reached, start timing. 