This is the 2610th most frequent Catalan word.
oliver
"Oliver" in Catalan means "olive tree."
Here, 'oliver' is used as a noun meaning 'olive tree', which fits the context as it describes a tree.
L'oliver al jardà produeix moltes olives cada any.
The olive tree in the garden produces many olives every year.
'D'oliver' is part of a compound noun phrase meaning 'olive tree's oil', focusing on the origin of the olive oil.
Aquest any hem adquirit un oli d'oliver molt fresc.
This year we have acquired a very fresh olive oil.
'Oliver' again as a noun represents the olive tree, commonly used symbolically in literature.