noun The image-making power of the mind; the act of mentally creating or reproducing an object not previously perceived; the ability to create such images.
Imagination is one of the most advanced human faculties.
noun Particularly, construction of false images; fantasizing.
You think someone's been following you? That's just your imagination.
noun Creativity; resourcefulness.
His imagination makes him a valuable team member.
noun A mental image formed by the action of the imagination as a faculty; something imagined.