From Longman Dictionary of Contemporary Englisha figment of somebody’s imaginationa figment of somebody’s imaginationIMAGINEsomething that you imagine is real, but does not exist → figment
Examples from the Corpus
a figment of somebody’s imagination• These two men actually lived; they weren't figments of some writer's imagination.• The gymslip Lolita is not entirely a figment of the male imagination.• The carpet is a figment of the imagination: an oriental pattern of light and shadow projected on the floor.• The ugly rectory is a figment of my imagination, for there was never such a building on Wood Green.• But don't take my word for it; this is not a figment of the journalistic imagination.• It had vanished as silently as if it had been only a figment of her imagination.• Nearly three years after work had begun, the dam was still a figment of the imagination.• The Ghost of Banquo is more than a figment of Macbeth's imagination: it stands in some way in relation to his conscience.• Neither one was a figment of his imagination. 