Rocket/ˈrɑːkɪt/ Definition 1 of 4Pro Tip 1/3Space Vehicle Refers specifically to machines for space exploration. The Apollo 11 rocket carried the first humans to the Moon. Pro Tip 2/3Not Any Plane Don't confuse rockets with airplanes; rockets go to space. Unlike airplanes, a rocket can escape Earth's atmosphere. Pro Tip 3/3Powerful Imagery The term often symbolizes speed, power, or high-technology in metaphors. Her career took off like a rocket after the promotion.