imagination /ɪˌmæd͡ʒəˈneɪʃən/noun 4forms 1phrases 1 noun4 •the ability to picture in the mind things that are not present or that do not existImagination is one of the most advanced human faculties. •Particularly, construction of false images; fantasizing.You think someone's been following you? That's just your imagination. •Creativity; resourcefulness.His imagination makes him a valuable team member. •A mental image formed by the action of the imagination as a faculty; something imagined.It is a pleasant imagination to conceive a spirit iustly ballanced betweene two equall desires. — 1603 formsimaginations Phrases with imagination leave to the imaginationNot to reveal.