It realistically describes what happens to an aging knight who has been misled by the romances he has read; the titular Don Quixote sets out on his old horse to seek adventure, along with his squire Sancho Panza.

It doesn't mean anything. In Japan, the same chain of stores is called Don Quijote (ドン・キホーテ) after the character from Cervantes. When the store came overseas to Singapore, there was another business with the same name, so they chose a different one.

It is considered the first modern novel, doing for the Spanish language what William Shakespeare did for the English language. It's a work that has been translated into all major languages—in 700 editions.

(ˈdɒn kiːˈhəʊtiː , ˈkwɪksət , Spanish don kiˈxote ) noun. an impractical idealist.