A famous 1605–1615 Spanish novel by Miguel de Cervantes (1547–1616), whose full title is El ingenioso hidalgo don Quijote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha).
The protagonist of this novel.
Any person or character who displays quixotism.
cynical (in all senses)
Relating to the Dog Star.
A person who believes that all people are motivated by selfishness.
A person whose outlook is scornfully negative.