<p><strong>Noun</strong></p><ul><li>an act or instance of welling up:<ul><li>an upwelling of public support</li><li>an upwelling of emotion in his voice</li></ul></li><li>Oceanography:<ul><li>the process by which warm, less-dense surface water is drawn away from along a shore by offshore currents and replaced by cold, denser water brought up from the subsurface</li></ul></li></ul>