booster

noun boost·er \ ˈbü-stər \
Updated on: 30 Nov 2017

Definition of booster

: 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

  1. These exercises are real metabolism boosters.

  2. Music is my favorite mood booster.

  3. A sincere compliment can be a true confidence booster.

  4. The university has a number of wealthy boosters who contribute generously each year.

  5. a new design for rocket boosters

Recent Examples of booster from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'booster.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of booster

1888



Medical Dictionary

booster

noun boost·er \ ˈbü-stər \

medical Definition of booster

: a substance or dose used to renew or increase the effect of a drug or immunizing agent: such as
a (1) : booster shot
(2) : booster dose
b : synergist 1
  • a chemical acting as a booster to sulfa drugs


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