booster

noun

1. Something that boosts.
2. (abbreviation, alt-of, ellipsis)Ellipsis of booster seat.
3. The first stage of a multistage rocket, providing primary or supplemental thrust for liftoff and early flight.
4. A motor-generator set used for voltage regulation in direct current electrical power circuits.
5. Someone who publicly promotes or endorses (something or someone); a fan or supporter.

   “The Pied Piper treats Lowenstein as a metaphor for American post-war liberalism and subjects a once highly regarded political movement to the same scrutiny Lowenstein himself faces. Not too surprisingly, both come out wanting, though their boosters claim otherwise.”

   “Nor is his district quite the Democratic bastion boosters describe: voters there narrowly backed Barack Obama in 2008, but voted for Mr Bush by a hefty margin in 2004.”

6. A member of a booster club.
7. A booster dose.

   “When did you get your last tetanus booster?”

   “In the September vaccine monitor survey from the Kaiser Family Foundation, 71 percent of unvaccinated respondents said the need for boosters indicated that the vaccines were not working.”

8. A small quantity of a sensitive explosive that is triggered by a detonator and provides the energy needed to detonate a larger quantity of a less-sensitive explosive.
9. A term that serves to amplify or strengthen an utterance, such as "really".
10. A power-up item.
11. A package of cards or figurines designed to add to a player's collection.
12. (slang)A thief.

    “The security guard captured two boosters before they could exit the retail store.”

13. A booster engine fitted to a steam locomotive.

    “Another notable new series of locomotives, now in course of delivery to the Canadian National Railways, [...]. Fifteen are being built by the Montreal Locomotive Works Limited, and ten by the Canadian Locomotive Company, of Kingston, Ontario; the former are being provided with boosters and the latter are not.”

    “Also in 1939, six 4-8-4s, classified "Kb" because they have boosters, were built at Hillside for service between Christchurch and Arthurs Pass.”

verb

1. (transitive)To give a booster shot to; to boost.

   “"Hey guys, on the first day of our holiday break I tested positive for Covid. I was vaccinated and boostered which made me lucky enough to only have mild symptoms," he wrote beside a photo that showed him sitting alone inside a testing room wearing a mask.”

   “What I would prefer over hazard pay would be for every one of our patients to get vaccinated and boostered, as we request constantly. That would be what would make me happy.”