A light meal.
"The teacher divided the large bag of chips into equal snacks for each student in the class."
A share; a part or portion.
In plain English: A snack is something small and easy to eat that you have between meals instead of your main food.
"I grabbed an apple to snack on while I was waiting for the bus."
To eat a light meal.
"The hawk dived down to snack on the startled mouse running across the field."
To snatch.
The word comes from Middle Dutch snacken, meaning "to eat small bites," and entered English through that language. It is related to the modern German verb schnäken.