How does Sartre define existentialism?

Related questions

1. Is nihilism a depression?
2. What is the difference between essentialism and existentialism?
3. What was Soren Kierkegaard famous for?
4. What is the importance of existentialism?
5. Why is nihilism true?
6. Can religion and existentialism coexist?
7. What are characteristics of existentialism?
8. What is Existentialism mention its fundamental principles?
9. Will to meaning Kierkegaard?
10. What did Nietzsche mean by will to power?

Tags

1. #states
2. #existing
3. #being
4. #lives
5. #meaning
6. #while
7. #certain
8. #precedes
9. #human
10. #according
11. #acting
12. #existentialism
13. #choice
14. #defines
15. #revealing
16. #think
17. #theory
18. #should
19. #existence
20. #essence
21. #sartre