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To reduce, limit, decrease, or devalue something. The new administration has been slowly rolling back legislation meant to regulate the oil industry. The party has been controversial in its promise to roll back the taxes imposed on cigarettes and alcohol.
roll something back
to return something to someone by rotating it, as with a wheel or a ball, or moving it back on wheels. I intercepted the ball and rolled it back. Jane rolled back the ball.
[for something] to return, rotating or turning or moving on wheels. I rolled the ball away, thinking it would roll back. It didn't. I struck the golf ball out of the sand trap, but it rolled back.
Decrease, cut back, or reduce, especially prices, as in Unless they roll back oil prices, this summer's tourist traffic will be half of last year's . [c. 1940]
1. To reduce the power or influence of something: The government tried to roll back the growing student movement. When the union achieved a more powerful position, management tried to roll it back.
2. To reduce something, as a price or value, to a previous lower level: We had to roll back prices to compete with the discount stores. After the store owner raised prices on toasters, no one bought them, so she had to roll them back.