# triple point

> English word · Noun

## Definitions
1. The unique temperature and pressure at which the solid, liquid and gas phases of a substance are all in equilibrium.
2. A point where the incident shock wave, the reflected shock wave, the Mach stem, and one slipstream meet.
3. A point where a curve or surface intersects itself along three arcs.
4. The intersection of an occluded front, cold front, and warm front.
5. The point where two boundaries, such as a dry line, outflow boundary, or cold front, intersect.
6. A point where three plates intersect.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/triple-point