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Definition of Unpowered
1. Adjective. Not having or using power. "An autogiro is supported in flight by unpowered rotating wings"
Antonyms: Powered
Definition of Unpowered
1. Adjective. Lacking in power, especially electrical power. ¹
2. Adjective. Not using or requiring power, especially artificial power. For example, an unpowered boat (a sailing boat), aircraft (a glider) etc. ¹
¹ Source: wiktionary.com