This is the 243rd most frequent Dutch word.
vol
"Vol" means "full" in English.
Here, 'vol' means 'full' and is used as an adjective to describe the state of the cup being filled with water.
De beker is vol water.
The cup is full of water.
Here, 'vol' signifies a mental state, indicating a mind occupied with thoughts or ideas.
Zijn hoofd is vol met ideeën.
His head is full of ideas.
In this case, 'vol' is used figuratively to express that the program includes many interesting activities.