This is the 4294th most frequent Catalan word.
fulla
Leaf.
Here, "fulla" refers to a leaf, which is a common meaning in the context of nature and plants.
La fulla de l'arbre es va desprendre amb el vent.
The leaf of the tree detached due to the wind.
In this context, "fulla" means a sheet, specifically a sheet of paper, used for writing or printing.
Vaig escriure tot en una fulla de paper.
I wrote everything on a sheet of paper.
In this sentence, "fulla" stands for the blade of a knife, used metaphorically or literally to describe the cutting part of a knife.