Don Quixote

[don kee-hoh-tee, don kwik-suh t; Spanish dawn kee-haw-te] /ˌdɒn kiˈhoʊ ti, dɒn ˈkwɪk sət; Spanish dɔn kiˈhɔ tɛ/
noun
1.
the hero of a novel by Cervantes who was inspired by lofty and chivalrous but impractical ideals.
2.
(italics) (Don Quixote de la Mancha) the novel itself (1605 and 1615).

Quixote

[kee-hoh-tee, kwik-suh t; Spanish kee-haw-te] /kiˈhoʊ ti, ˈkwɪk sət; Spanish kiˈhɔ tɛ/
noun
1.
Don, Don Quixote.
British Dictionary definitions for Don Quixote

Don Quixote

/ˈdɒn kiːˈhəʊtiː; ˈkwɪksət; Spanish don kiˈxote/
noun
1.
an impractical idealist
Word Origin
after the hero of Cervantes' Don Quixote de la Mancha

Quixote

/ˈkwɪksət; Spanish kiˈxote/
noun
1.
Don Quixote in Culture
Don Quixote [(don kee-hoh-tay, don kee-hoh-tee, don kwik-suht)]

(1605–1615) A novel by Miguel de Cervantes. The hero, Don Quixote (don is a Spanish title of honor), loses his wits from reading too many romances and comes to believe that he is a knight destined to revive the golden age of chivalry. A tall, gaunt man in armor, he has many comical adventures with his fat squire, Sancho Panza.

Note: A person who is both idealistic and impractical is often said to be “quixotic.”