noun
a rocket engine that is used to slow down a spacecraft or missile
adjective
describing something that is characteristic of a style, fashion, or design from the past
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The retro rocket on the spacecraft was designed to safely slow down its descent back to Earth.
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Check out the cool retro rocket on that vintage spaceship!
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I wish my car had a retro rocket to help me beat traffic!
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Using meditation as a retro rocket, she propelled herself into a state of deep relaxation.