As a Noun:
1. The place where a person or thing is. English = whereabouts, location.
As Modifier:
1. Used before a phrase or clause that specifies or refers to the place in which something is situated or happens. English = where, the place in which.
As Question:
1. Used at the beginning, end or at both the beginning and end of a sentence to ask a question about the place something is in, or is coming from, or is going to. English = where.