Definition of "chestnut" []

• Any of several deciduous trees of the genus Castanea native to northern temperate regions, having alternate simple toothed leaves, and nuts that are enclosed in a prickly husk. (noun)
• The often edible nut of any of these trees. (noun)
• The wood of any of these trees. (noun)
• Any of several other plants, such as the horse chestnut. (noun)
• A moderate to deep reddish brown. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This is, to repeat the old Wittgenstein chestnut below, like the sunset: It “looks like” the sun is setting, when in reality the earth is turning on its axis."
• "The "we're descending into an ice age" chestnut is actually a great demonstration of how well science works."
• "I do like chestnuts too, usually eaten with pasta or in chestnut flavour Kit-Kats, which have an almost coffee-like flavour and are well worth hunting down."