[boo-ster] 
| 1. | a person or thing that boosts, esp. an energetic and enthusiastic supporter. |
| 2. | Electricity. a device connected in series with a current for increasing or decreasing the nominal circuit voltage. |
| 3. | Railroads. any machine, device, phenomenon, etc., that helps to move a train, as a tailwind, downgrade, roller bearings, or esp. a helper locomotive. |
| 4. | Military. an explosive more powerful than a primer, for ensuring the detonation of the main charge of a shell. |
| 5. | Rocketry.
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| 6. | Medicine/Medical. Also called booster dose, booster shot. a dose of an immunizing substance given to maintain or renew the effect of a previous one. |
| 7. | Pharmacology. a chemical compound, medicinal substance, or the like, that serves as a synergist. |
| 8. | a radio-frequency amplifier for connecting between a radio or television antenna and the receiving set to intensify the received signal. |
| 9. | an auxiliary pump, used in a pipeline or other system, to add to or maintain a prevailing amount of pressure or vacuum. |
| 10. | Slang. a shoplifter or petty thief. |
booster boost·er (b&oomacr;'stər)
n.
An additional dose of an immunizing agent, such as a vaccine or toxoid, given at a time after the initial dose to sustain the immune response elicited by the previous dose of the same agent. Also called booster dose, booster shot.
booster (b 'stər) Pronunciation Key
An additional dose of an immunizing agent, such as a vaccine or toxoid, given at a time period of weeks to years after the initial dose to sustain the immune response elicited by the first dose. Tetanus, diphtheria, and measles vaccines are commonly given in booster doses. |
stər