Science, Tech, Math › Science Vapor Pressure Definition Chemistry Glossary Definition of Vapor Pressure Share Flipboard Email Print Mercury is a metal with a high vapor pressure. Femto/Elementbox04, wikipedia.org Science Chemistry Chemical Laws Basics Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry in Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate by Anne Marie Helmenstine, Ph.D. Updated March 06, 2017 Vapor Pressure Definition: The pressure exerted by a vapor in equilibrium with the solid or liquid phase of the same substance. Also, the partial pressure of the substance in the atmosphere above the solid or the liquid.Return to the Chemistry Glossary Index citecite this article Format mla apa chicago Your Citation Helmenstine, Anne Marie, Ph.D. "Vapor Pressure Definition." ThoughtCo, May. 16, 2014, thoughtco.com/definition-of-vapor-pressure-604683. Helmenstine, Anne Marie, Ph.D. (2014, May 16). Vapor Pressure Definition. Retrieved from https://www.thoughtco.com/definition-of-vapor-pressure-604683 Helmenstine, Anne Marie, Ph.D. "Vapor Pressure Definition." ThoughtCo. https://www.thoughtco.com/definition-of-vapor-pressure-604683 (accessed April 22, 2018). copy citation Continue Reading