This is the 2318th most frequent Swedish word.
brevlådan
Mailbox.
Here, 'brevlådan' is used as a noun to refer to a literal mailbox where letters are placed.
Jag lägger brevet i brevlådan.
I am putting the letter in the mailbox.
In this sentence, 'brevlådan' denotes the physical container for receiving mail, emphasizing its current state.
Brevlådan är full med tidningar.
The mailbox is full of newspapers.
In this context, 'brevlådan' indicates the location (the mailbox) towards which the subject is moving.