Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
phantasy is a noun meaning "something many people believe that is false". It carries 3 recorded senses.
something many people believe that is false
“they have the illusion that I am very wealthy”
fiction with a large amount of imagination in it
“she made a lot of money writing romantic fantasies”
imagination unrestricted by reality
“a schoolgirl fantasy”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for phantasy come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.