What is the difference between illusion and allusion?

Related questions

1. What does it mean to have no illusions?
2. Is it illusions of grandeur or delusions of grandeur?
3. What's the difference between a delusion and a hallucination?
4. What are the different types of illusions?
5. What is difference between illusion and delusion?
6. What is the most common type of delusion?
7. Does a delusional person know they are delusional?
8. What is an illusion in literary terms?
9. What causes illusion?
10. What is the verb of illusion?

Tags

1. #deceives
2. #reality
3. #senses
4. #illusions
5. #impression
6. #someone
7. #perception
8. #direct
9. #allusion
10. #visual
11. #though
12. #illusion
13. #always
14. #reference
15. #optical
16. #implied
17. #often
18. #false
19. #other
20. #creating
21. #something
22. #related