booster

Noun
  1. A person who backs a politician or a team etc. (synset 110697152)
    "all their supporters came out for the game"; "they are friends of the library"
  2. Someone who is an active supporter and advocate (synset 110501805)
  3. A thief who steals goods that are in a store (synset 109886067)
  4. An amplifier for restoring the strength of a transmitted signal (synset 102875890)
  5. The first stage of a multistage rocket (synset 102875694)
  6. An additional dose that makes sure the first dose was effective (synset 102875533)

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