What does the term "flash point" mean?

The term "flash point" refers to the lowest temperature at which a liquid generates enough vapor to form a flammable mixture with air. At this temperature, the concentration of vapor produced is sufficient to ignite when exposed to an open flame or spark, but the liquid itself does not continue to burn without an external ignition source. This concept is crucial in safety and engineering, especially in handling and storing flammable liquids, as it helps determine the appropriate safety measures to prevent fires. Understanding the flash point is essential for ensuring safe operational practices in various industrial settings. The other choices misrepresent the characteristics of flash point and related combustion properties.