From The Collaborative International Dictionary of English v.0.48:

Quixotism \Quix"ot*ism\ (kw[i^]ks"[o^]t*[i^]z'm), n.
   That form of delusion which leads to extravagant and absurd
   undertakings or sacrifices in obedience to a morbidly
   romantic ideal of duty or honor, as illustrated by the
   exploits of Don Quixote in knight-errantry. See quixotic.
   [1913 Webster]
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