The Collaborative International Dictionary of English v.0.48:
Dream \Dream\, v. i. [imp. & p. p. Dreamed (dr[=e]md) or
Dreamt (dr[e^]mt); p. pr. & vb. n. Dreaming.] [Cf. AS.
dr[=e]man, dr[=y]man, to rejoice. See Dream, n.]
1. To have ideas or images in the mind while in the state of
sleep; to experience sleeping visions; -- often with of;
as, to dream of a battle, or of an absent friend.
2. To let the mind run on in idle revery or vagary; to
anticipate vaguely as a coming and happy reality; to have
a visionary notion or idea; to imagine.
Here may we sit and dream
Over the heavenly theme. --Keble.
They dream on in a constant course of reading, but
not digesting. --Locke.