Reverie
Reverie , noun
[French réverie, from rêver to dream, rave, be light-headed. Compare Rave.]
1.
A loose or irregular train of thought occurring in musing or mediation; deep musing; daydream.
Rapt in nameless reveries.
When ideas float in our mind without any reflection or regard of the understanding, it is that which the French call revery, our language has scarce a name for it.
2.
An extravagant conceit of the fancy; a vision. [Rare]
There are infinite reveries and numberless extravagancies pass through both [wise and foolish minds].
Also: Revery