This is the 6623rd most frequent Dutch word.
voorheen
Previously.
The word "voorheen" is used here to express that something occurred or existed earlier in time.
Voorheen woonde hij in Amsterdam.
Previously, he lived in Amsterdam.
In this sentence, "voorheen" indicates that the function or identity of the subject of the sentence was different in the past compared to now.
Dit gebouw was voorheen een school.
This building was previously a school.
Here, "voorheen" is used to describe a past condition or situation, denoting a comparison between past and present.