nihilism

noun

1. 1

   (usually uncountable) The view that all endeavours are devoid of objective meaning.

2. 2

   (usually uncountable) The rejection of, or opposition to, religious beliefs, (inherent or objective) moral principles, legal rules, etc., often due to the view that life is meaningless (sense 1).

3. 3

   (usually uncountable) The rejection of non-proven or non-rationalized assertions in the social and political spheres of society.

4. 4

   A delusion that oneself or the world, or parts thereof, have ceased to exist.

5. 5

   (Russia) Alternative letter-case form of Nihilism

6. 6

   A doctrine grounded on the negation of one or more meaningful aspects of life; in particular, the view that nothing in the world actually exists.

7. 7

   Something that is regarded as meaningless.