height: a high place, the heights, on high; most often heaven as the high place where God dwells.
At its core this word names elevation itself, the quality of being high up and the place that is high. From that one idea the Bible draws several shades that all stay tied together. The most common is heaven, pictured as the supreme height: God dwells on high, looks down from there, and reaches down from there to rescue. Closely related is ordinary elevated ground on earth, the top of a mountain or hill or the high point of a city.
Because height suggests safety and honor, the word also describes being lifted up to a secure or dignified position, set out of reach of trouble. And because height can swell into arrogance, it turns negative as well: people who hold their heads high, speak loftily, and look down on others, a proud height that God brings crashing down.
So the same word can be a comfort or a warning depending on who is high. When God is on high, height means greatness and rescue; when proud people climb high, height becomes the pride that invites their fall.