1. Something apparently seen but having no physical reality; a phantom or an apparition. Also called phantasma. 2. An illusory mental image. Also called phantasma. 3. In Platonic philosophy, objective reality as perceived and distorted by the five senses.
ETYMOLOGY:
Middle English fantasme, from Old French, from Latin phantasma, from Greek, from phantazein, to make visible, from phantos, visible, from phainein, to show. See bh-1 in Appendix I.