1. A part or share of something: This is the most common meaning. For example:
* "He ate a large portion of the pie."
* "Each person received a portion of the inheritance."
* "The lion had a portion of the antelope."
2. A quantity or amount: This meaning is often used when talking about food or other things that can be measured. For example:
* "I need a small portion of milk for my cereal."
* "The recipe calls for a portion of sugar."
3. To divide something into parts: This is a less common usage, but it is still valid. For example:
* "The cake was portioned out into twelve slices."
In summary, "portion" refers to a part, share, or quantity of something. It can also mean to divide something into parts.