From Longman Dictionary of Contemporary Englishfantasizefan‧ta‧size (also fantasise British English) /ˈfæntəsaɪz/ verb [intransitive, transitive] IMAGINEto imagine that you are doing something which is very pleasant or exciting, but which is very unlikely to happen SYN dreamfantasize about Sometimes she fantasized about buying a boat and sailing around the world.fantasize that I used to fantasize that my real parents were famous movie stars.► see thesaurus at imagine→ See Verb table
Examples from the Corpus
fantasize• I often fantasize about living in a big house with tennis courts and a swimming pool.• Many men fantasize about sleeping with someone who is not their partner.• Some children even go beyond such fantasizing and actually run away in search of this ideal home.• Alice stole one long drink before rolling over in the boundless bed, fantasizing it as an endless beach of white cloud.fantasize that• He begins to fantasize that if he tried hard he could shrink to a tiny size and crawl inside the set.