Noun big dipper has 2 senses
  1. Big Dipper, Dipper, Plough, Charles's Wain, Wain, Wagon - a group of seven bright stars in the constellation Ursa Major
    --1 is a kind of asterism
    --1 is a part of Great Bear, Ursa Major
  2. roller coaster, big dipper, chute-the-chute - elevated railway in an amusement park (usually with sharp curves and steep inclines)
    --2 is a kind of elevated railway, elevated railroad, el, overhead railway; ride
    --2 has particulars: hypercoaster
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