What does hereinafter referred to as mean?

What does hereinafter referred to as mean?

in the following part

How do you write here after?

4 Answers. They are both suitable, but the difference between them is that hereinafter (sometimes written as two words, herein after) usually pertains just to writing within a document, While henceforth is more general, and just means from now on.

Is it hereafter or hereinafter?

As adverbs the difference between hereafter and hereinafter is that hereafter is in time to come; in some future time or state...