A basic google search for the definition of delusion: Search

• Delusional — having false or unrealistic beliefs or opinions: (Dictionary.com)
• Delusion definition is — something that is falsely or delusively believed or propagated. —( Merriam Webster)
• delusional definition: believing things that are not true —( Cambridge English Dictionary)
• A delusional person believes things that couldn’t possibly be true — Volcabulary.com

You realize that there’s more than just the mental disorder definition of delusion?

This is not like that time when you tried to redefine the meaning of rights to try to get your views on the firearms better accepted?