(noun)(plural)

1. Something, such as a thought or conception, that potentially or actually exists in the mind as a product of mental activity.
2. The transcript, image, or picture of a visible object, that is formed by the mind; also, a similar image of any object whatever, whether sensible or spiritual.
3. A general notion, or a conception formed by generalization.
4. An object or a picture created by the imagination

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