The pressure at which a vapor and a liquid are in equilibrium. “Saturation pressure” is often used interchangeably with “bubble-point pressure” and “dew-point pressure”. (RP 44)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}