1. To control and have power or authority over someone or something: The children thought that their mother dominated them too much because she always commanded them to do chores, she checked their homework every day, and she made them eat everything on their plates at meal times.
2. To be the most important aspect or element of something: When the couple was invited to dinner that evening, Mrs. Hill dominated the conversation so much that no one else could say anything!
3. To have a prevailing influence on someone or something: The use of cell phones do dominate the amount of spare time people have during the day and night!

A description of a high-temperature hydrothermal system in which mixed water and steam exist, and steam is the pressure-controlling fluid phase: "Vapor-dominated systems; such as, "The Geysers" in northern California, are relatively rare but have high heat content and are well suited for the production of electrical power; while the more common liquid-dominated systems have lower heat content and are suited for direct heat uses."