quixotic

Resembling or characteristic of the Spanish chivalric hero Don Quixote; possessed with or resulting from the desire to do noble and romantic deeds, without thought of realism and practicality.

Olivier, as you know, was quixotic, and would not permit a secret service and spies.

The message is not subliminal. […] Characters aren’t just quixotic, they cite Cervantes to one another.

Overly optimistic and moralistic.

Exceedingly idealistic.

Call it a brain freeze, another 'Aleppo moment,' or a mere campaign stumble, but Gary Johnson has stumbled again in his quixotic presidential campaign.

A quixotic person or sentiment.

The cultural quixotics attribute the change to inscrutable "cultural factors," which is tantamount to abandoning altogether the search for explanation.

Alternative letter-case form of quixotic.

Don Quixote undertook to redress the bodily wrongs of the world, but the redressment of mental vagaries would be an enterprise more than Quixotic.

When we see a man dramatically lamenting in a publication intended to be believed, that “The age of chivalry is gone;” that “the glory of Europe is extinguished forever!” that “the unbought grace of life (if any one knows what it is,) the cheap defence of nations, the nurse of manly sentiment and heroic enterprise is gone!” And all this because the Quixotic [1791: Quixote] age of chivalric nonsense is gone, what opinion can we form of his judgment, or what regard can we pay to his facts?