[ˈbuːstə], (Noun)

Definitions:
- a device for increasing electrical voltage or signal strength

- the first stage of a rocket or spacecraft, used to give initial acceleration and then jettisoned

- a dose of a vaccine that increases or renews the effect of an earlier one
(e.g: boosters at five-year intervals are recommended)

- a source of help or encouragement
(e.g: job fairs are a great morale booster)

- a shoplifter


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