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Definition of Rocket belt
1. Noun. (aviation) a wearable backpack device using rocket thrust to propel a person into the air ¹
2. Noun. (aviation) a wearable backpack device that can propel a person into the air ¹
3. Noun. (aviation) a belt with rockets attached that can propel a person into the air ¹
¹ Source: wiktionary.com