To rebel or revolt against authority or an established system. The citizens decided to rise up against the oppressive regime.
To ascend or move to a higher position or level. The hot air balloon began to rise up into the sky.
To stand up or get up from a sitting or lying position. He watched her rise up from the chair and walk towards the window.
To increase in intensity, volume, or level. The sound of the music began to rise up as the concert started.