Tower/ˈtaʊər/ Definition 1 of 5Pro Tip 1/3Distinctive Skyline Tall towers often define city skylines and can become cultural symbols. The Space Needle towers over Seattle's skyline. Pro Tip 2/3Visibility from Afar Towers are visible from a distance, serving as landmarks for navigation. We could see the watchtower from five miles away. Pro Tip 3/3Utilitarian Structures Towers often have practical uses, like holding water or antennas. The cell phone tower ensures good signal in the area.