Amplification Devices

noun a substance used to increase or enhance something, such as a booster dose of a vaccine

verb to increase or enhance something, as in 'to booster the performance of a car engine'

adjective relating to or being a booster, such as a booster seat for a child

• The rocket was equipped with a booster to help it reach higher altitudes.
• I always take a vitamin C booster when I feel a cold coming on.
• I need a confidence booster before going on stage.
• The new marketing campaign was a real booster for sales.