/rʌn/v[I/T](present participlerunning, past tenseran/ræn/, past participlerun)(OPERATE)
›to manage or operate something: [T]She runs the business out of her home.[I]She left the engine running while she went into the store.[T]Can you run both of these programs at once?[T]They’re running tests on his heart functions.›If something runs on a particular type of energy, it uses that type of energy to operate: [I]Some calculators run on solar power .