Open Dictionary
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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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Usage examples (34)
  • It is a once-in-a-lifetime kind of crusade for Oprah.
  • And it was an adventure, it was a once-in-a-lifetime thing.
  • "I feel like this is probably lucky, once-in-a-lifetime stuff."
  • And it's kind of a once-in-a-lifetime opportunity here, gentlemen.
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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.