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Noun: jillion  jil-yun
Usage: N. Amer, informal
  1. A very large indefinite number (usually hyperbole)
    "there were jillions of flies";
    - million [informal], billion [informal], trillion [informal], zillion [informal], gazillion [informal], bazillion [N. Amer, informal], bajillion [informal], squillion [informal]

Derived forms: jillions

Type of: large indefinite amount, large indefinite quantity

Encyclopedia: Jillion