Dictionary

booster

noun boost·er \ˈbü-stər\

Definition of BOOSTER

:  one that boosts: 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 that increases the effectiveness of a medicament; especially :  booster shot
ADVERTISEMENT

Examples of BOOSTER

  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

First Known Use of BOOSTER

1888
Medical Dictionary

booster

noun boost·er \ˈbü-stər\

Medical Definition of BOOSTER

:  a substance that increases the effectiveness of a medicament; especially :  booster shot

Browse

9 ENTRIES FOUND:
Next Word in the Dictionary: booster batteryPrevious Word in the Dictionary: boost All Words Near: booster
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears