What is the antonym of context?

There isn't a single perfect antonym for "context," as its meaning is quite broad. However, depending on the specific situation, some possible antonyms include:

For the meaning of "surrounding circumstances":

* Isolation

* Vacuum

* Abstraction

* Irrelevance

For the meaning of "background information":

* Ignorance

* Unfamiliarity

* Lack of knowledge

For the meaning of "framework":

* Chaos

* Disorder

* Lack of structure

Ultimately, the best antonym depends on the specific usage of "context" in a given sentence.