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2.
Someone who visions of happiness and peace for mankind. Someone who believes that someday the world will truly be as one.
Jim always try to see the good in people. He's always kind, and always doing the right thing. What's up with him, is he a hippie?

Maybe he's a dreamer.
by anthony binas April 16, 2008
 
1.
One who doesn't think by physical boundaries, who has 'his head in the clouds'.
Bud is a dreamer, he can't seem to focus.
by Catch Stanguard January 19, 2004
 
3.
Morphine.
"can you score me some dreamer?"
by Weezys Babii July 22, 2008