This is the 7462nd most frequent Dutch word.
briefje
A small note or piece of paper.
In this sentence, 'briefje' refers to a small piece of paper or note containing information.
Hij gaf me een briefje met zijn telefoonnummer.
He gave me a note with his phone number.
Here, 'briefje' is used to denote a banknote or bill of currency.
Ik betaalde met een briefje van vijftig euro.
I paid with a fifty euro bill.
In this context, 'briefje' indicates a short written message or a note for communication.