Definitions from Wiktionary (booster)

▸ noun:  Something that boosts.
▸ noun:  The first stage of a multistage rocket that provides the thrust for liftoff and the initial flight.
▸ noun:  A motor-generator set used for voltage regulation in direct current electrical power circuits.
▸ noun:  Someone who is a fan or supporter of something.
▸ noun:  Someone who promotes a town or business.
▸ noun:  A member of a booster club.
▸ noun:  (immunology) A booster dose.
▸ noun:  (explosives) 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.
▸ noun:  (linguistics) A term that serves to amplify or strengthen an utterance, such as "really".
▸ noun:  (video games) A power-up item.
▸ noun:  (gaming) A package of cards or figurines designed to add to a player's collection.
▸ noun:  (slang) A thief.
▸ noun:  (rail transport) A booster engine fitted to a steam locomotive.
▸ verb:  (transitive, medicine) To give a booster shot to; to boost.
▸ noun:  Short for booster seat. [A small seat placed upon standard seating, particularly to enable children to eat at a table or (automotive) to allow safer use of regular seat belts.]

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