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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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Short "hint"

An enthusiastic supporter. An extra dose of immunizing agent given to maintain immunity.

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Usage examples (3)
  • I was glad I had gotten my tetanus booster shot when I accidentally stepped on a rusty nail.
  • Both failures came when the seat was being used with its five-point harness; we found no problems in booster-seat mode.
  • They then added a 'booster' consisting of a regular seasonal flu vaccine.
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.