Noun autumn has 1 sense
  1. fall, autumn - the season when the leaves fall from the trees; "in the fall of 1973"
    --1 is a kind of season, time of year
    --1 has parts:
     Indian summer, Saint Martin's summer; September, Sep, Sept; October, Oct; November, Nov; autumnal equinox, September equinox, fall equinox
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