autumn leaf

noun — 2 senses

noun

An Asian nymphalid butterfly, Doleschallia bisaltide.

noun

One of many leaves that fall from a deciduous tree in autumn.

The "King" responded well to this treatment and would have maintained 60 m.p.h. up the steepest part had it not been for a brief bout of slipping, which was quickly corrected by Driver Bailes ("Autumn leaves", he remarked laconically).1960 February, R. C. Riley, “The London-Birmingham services - Part, Present and Future”, in Trains Illustrated, page 105:

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