: 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
Synonyms
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
Starring Indy booster extraordinaire Mike Epps, the sitcom series’ fifth batch of shows drops April 18.
—
The Indianapolis Star, 17 Apr. 2024
She’s also been a member of the Glendale Women’s Club and served in leadership positions with other local organizations such as the Historic Downtown Merchants Association and the Glendale High School football booster club.
—Shawn Raymundo, The Arizona Republic, 15 Apr. 2024
Thursday’s mission marked the third launch for the reusable booster rocket, which helped get two previous Starlink missions into low orbit, according to SpaceX.
California
Rockets?
—Jack Dolan, Los Angeles Times, 11 Apr. 2024
The resulting collection of three creams, three booster roll-on fragrances and a serum also address the effect of texture and smell on our emotional responses.
—Kathleen Baird-Murray, Vogue, 10 Apr. 2024
Best Herbal Appetite Suppressant Powher Cut: Top Appetite Suppressant For Increased Energy
#1 PhenQ: Appetite Suppressant and Fat Burner Combo
PhenQ is a powerful 5-in-1 weight loss pill that works as an appetite suppressant, fat burner, and metabolism booster.
—Weight Loss Advisors, Discover Magazine, 3 Apr. 2024
People at high risk for COVID should still follow their provider’s recommendations for getting COVID shots and boosters.
—Syeda Khaula Saad, Verywell Health, 2 Apr. 2024
The space shuttle is launched with the aid of huge rocket boosters not shown in the photo and only reaches top speeds at elevations where there is virtually no air resistance.
—Kim Breen, USA TODAY, 2 Apr. 2024
There are currently no recommendations for an annual booster.
—Youri Benadjaoud, ABC News, 28 Mar. 2024
The Indianapolis Star, 17 Apr. 2024
She’s also been a member of the Glendale Women’s Club and served in leadership positions with other local organizations such as the Historic Downtown Merchants Association and the Glendale High School football booster club.
—Shawn Raymundo, The Arizona Republic, 15 Apr. 2024
Thursday’s mission marked the third launch for the reusable booster rocket, which helped get two previous Starlink missions into low orbit, according to SpaceX.
California
Rockets?
—Jack Dolan, Los Angeles Times, 11 Apr. 2024
The resulting collection of three creams, three booster roll-on fragrances and a serum also address the effect of texture and smell on our emotional responses.
—Kathleen Baird-Murray, Vogue, 10 Apr. 2024
Best Herbal Appetite Suppressant Powher Cut: Top Appetite Suppressant For Increased Energy
#1 PhenQ: Appetite Suppressant and Fat Burner Combo
PhenQ is a powerful 5-in-1 weight loss pill that works as an appetite suppressant, fat burner, and metabolism booster.
—Weight Loss Advisors, Discover Magazine, 3 Apr. 2024
People at high risk for COVID should still follow their provider’s recommendations for getting COVID shots and boosters.
—Syeda Khaula Saad, Verywell Health, 2 Apr. 2024
The space shuttle is launched with the aid of huge rocket boosters not shown in the photo and only reaches top speeds at elevations where there is virtually no air resistance.
—Kim Breen, USA TODAY, 2 Apr. 2024
There are currently no recommendations for an annual booster.
—Youri Benadjaoud, ABC News, 28 Mar. 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.
Articles Related to booster
Dictionary Entries Near booster
Cite this Entry
“Booster.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/booster. Accessed 25 Apr. 2024.
Copy CitationKids Definition
booster
noun
boost·er
ˈbü-stər 
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
: 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share