Relation to a language as it is at a particular point in time

Synchronic: Relation to a language as it is at a particular point in time

  1. Does “as” mean when?
  2. What does the bold part mean?

This being a part of a sentence, you could only guess what was meant as having the ‘ relation to a language’. Anyway, it deals with ‘the actual state of affairs’ in a language (its grammar, lexicon,…) ‘at a particular point in time’ (bearing in mind permanent changes we witness in a language).