The Oxford Thesaurus An A-Z Dictionary of Synonyms - day-dream n.

1) reverie, wool-gathering, fantasy, fancy, dream, musing, castle in the air or in Spain, pipedream: The realities of life have cured me of many day-dreams. --v. 2) fantasize, imagine, fancy, envision, dream: She still day-dreams that a knight in shining armour will come and carry her away.