What does blueberry mean?
blueberry
Plural: blueberries

Definition
A small round dark blue berry with a pale powdery coating on its skin.
Example sentences
I just throw the frozen blueberries straight into the blender — no need to defrost them.
I just throw the frozen blueberries straight into the blender — no need to defrost them.
There were a few shriveled blueberries left in the back of the fridge, and honestly I ate them anyway.
She wanted blueberries on her birthday cake until she saw how expensive they were, so we switched to strawberries.