a. idealistic without regard to practicality
Constantly coming up with quixotic, unworkable schemes to save the world, Simon has his heart in the right place, but his head somewhere in the clouds.
Sentence in Classic:
From that blessed little room, Roderick Random, Peregrine Pickle, Humphrey Clinker, Tom Jones, the Vicar of Wakefield, Don Quixote, Gil Blas, and Robinson Crusoe, came out, a glorious host, to keep me company.
David Copperfield By Charles Dickens Context
Yes, no sooner does a man get a little education into his head than he becomes a Don Quixote, and establishes schools on his estate such as even a madman would never have dreamed of.
Dead Souls By Nikolai Vasilievich Gogol Context