booster

noun

boost·​er ˈbü-stər How to pronounce booster (audio)
: one that boosts: such as
a
: an enthusiastic supporter
b
: an auxiliary device for increasing force, power, pressure, or effectiveness
c
slang : shoplifter
d
: a radio-frequency amplifier for a radio or television receiving set
e
: the first stage of a multistage rocket providing thrust for the launching and the initial part of the flight
f
: a substance or dose used to renew or increase the effect of a drug or immunizing agent
especially : booster shot

Examples of booster in a Sentence

These exercises are real metabolism boosters. Music is my favorite mood booster. A sincere compliment can be a true confidence booster. The university has a number of wealthy boosters who contribute generously each year. a new design for rocket boosters
Recent Examples on the Web The couple are longtime Bruins donors and boosters. Ryan Finley, San Diego Union-Tribune, 14 Mar. 2024 Early into the launch, SpaceX observed that all 33 of its Raptor engines in the booster worked as expected. Eric Lagatta, USA TODAY, 14 Mar. 2024 The spaceship and the Super Heavy booster it is attached to are intended to eventually replace the company’s workhorse Falcon 9 rocket. Laurence Darmiento, Los Angeles Times, 14 Mar. 2024 Those discoveries—and her determination that multiple boosters were needed for full immunity—were crucial to facilitating Salk’s development of the inactivated virus vaccine that still is in use today, some 70 years later. Alicia Ault, Smithsonian Magazine, 12 Mar. 2024 Now, the program is coming to an end as the Centers for Disease Control and Prevention announces a significant decrease in COVID-19 isolation time and another round of vaccine boosters for older Americans. Irene Wright, Miami Herald, 6 Mar. 2024 Worried about side effects from your third booster? Jacob Stern, The Atlantic, 6 Mar. 2024 In your quest for a six-pack, all that exercise is releasing feel-good endorphins, improving brain health, and reducing cortisol levels while also improving body image—a major self-confidence booster. Adam Morganstern, Robb Report, 2 Mar. 2024 Lastly, players can add on a booster that applies a passive perk for the squad With only four slots and a booster, players and their team have to pick the right Stratagems for the job. Gieson Cacho, The Mercury News, 26 Feb. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'booster.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1888, in the meaning defined above

Time Traveler
The first known use of booster was in 1888

Dictionary Entries Near booster

Cite this Entry

“Booster.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/booster. Accessed 29 Mar. 2024.

Kids Definition

booster

noun
boost·​er ˈbü-stər How to pronounce booster (audio)
1
: one that boosts
2
: an enthusiastic supporter
3
4
: a device for strengthening radio or television signals
5
: the first stage of a multistage rocket providing force for the launching and the first part of the flight

Medical Definition

booster

noun
boost·​er ˈbü-stər How to pronounce booster (audio)
: a substance or dose used to renew or increase the effect of a drug or immunizing agent: such as
a(1)
(2)
b
: synergist sense 1
a chemical acting as a booster to sulfa drugs

More from Merriam-Webster on booster

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