Small, red berries that grow on a rowan tree.
Rowanberries are often used to make jelly or wine.
Examples:
She picked some rowanberries for the jam.
The birds eat the rowanberries from the tree.
I found some rowanberries in the forest.
The rowanberries made a very sour jam.
The tree was full of rowanberries, like a red cloud.
I ate a whole handful of rowanberries, and they were very tasty.