Definitions for "Triple Point"
a point in a phase diagram where the three states of matter are in equilibrium.
A point at which three phase boundaries meet. It is most commonly applied to the point at which solid, liquid and vapour phases simultaneously coexist. It is a characteristic of a particular substance.
The intersection between two atmospheric boundaries, such as a gust front and an outflow boundary, and often a focal point for thunderstorm development. It is also the condition of temperature and pressure under which the gaseous, liquid, and solid forms of a substance can exist in equilibrium.