Meaning of “where” - Learner’s Dictionary

where

conjunction uk us /weər/
PLACE/POSITION

A2 at, in, or to a place or position:

He's not sure where they are.
I know where to go.
PART OF PROCESS/SITUATION

B2 relating to a particular part of a process or situation:

We've now reached the point where we can make a decision.

(Definition of “where conjunction” from the Cambridge Learner’s Dictionary © Cambridge University Press)