revery

{ } n.; pl. Reveries [ F. réverie, fr. rêver to dream, rave, be light-headed. Cf. Rave. ] 1. A loose or irregular train of thought occurring in musing or mediation; deep musing; daydream. “Rapt in nameless reveries.” Tennyson. [ 1913 Webster ]

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. Locke. [ 1913 Webster ]

2. An extravagant conceit of the fancy; a vision. [ R. ] [ 1913 Webster ]

There are infinite reveries and numberless extravagancies pass through both [ wise and foolish minds ]. Addison. [ 1913 Webster ]