noun🔗ShareJun. In the International System of Units, the derived unit of energy, work and heat; the work required to exert a force of one newton for a distance of one metre. Also equal to the energy of one watt of power for a duration of one second. Symbol: J"The lightbulb used 60 joules of energy every second. "Bóng đèn đó sử dụng 60 jun năng lượng mỗi giây.energyphysicsunitscienceamounttechnicalChat với AIGame từ vựngLuyện đọc