The Ontological argument (n.) draws its necessity from the thing, not the thought — I do not make God exist by thinking him; his existence compels me to think him so.
3 definitions
Definition.com
Definition.com
The Ontological argument (n.) holds that the idea of God need never be entertained — but whenever it is drawn from the storehouse of the mind, it comes with all perfections attached, existence among them.
Definition.com
The Ontological argument (n.) is neither argument nor proof, but a psychological fact: 'God is, because he is thought' is true — indeed nothing but a statement of identity — and its only mistake is trying to argue logically.