Definify.com
Webster 1913 Edition
Revery
{ 
Rev′er-ie
,Rev′er-y
, }Noun.
pl. 
Reveries 
(#)
. 1. 
A loose or irregular train of thought occurring in musing or mediation; deep musing; daydream. 
“Rapt in nameless reveries.” Tennyson.
 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.
2. 
An extravagant conceit of the fancy; a vision. 
[R.] 
There are infinite 
 reveries 
and numberless extravagancies pass through both [wise and foolish minds]. Addison. 
Webster 1828 Edition
Revery
REV'ERY
, n.1.
  Properly, a raving or delirium; but its sense, as generally used, is a loose or irregular train of thoughts, occurring in musing or meditation; wild, extravagant conceit of the fancy or imagination.  There are reveries and extravagancies which pass through the minds of wise men as well as fools.2.
  A chimera; a vision.