Meaning

noun someone who is dreaming

noun someone guided more by ideals than by practical considerations

noun a person who escapes into a world of fantasy

originFrom Middle English dremer, dremere, dremare, equivalent to dream + -er. Cognate with West Frisian dreamer (“dreamer”), Saterland Frisian Dröömer (“dreamer”), Dutch dromer (“dreamer”), German Träumer (“dreamer”), Danish drømmer (“dreamer”), Swedish drömmare (“dreamer”).

Etymology from Wiktionary, CC BY-SA 3.0