Nora was shunned when she first came to the new school, but then she found a group of friends that she likes very much.
- When you ignored someone and refused to include him, this is an example of a situation where you shunned him.
- When you were ignored and left out, this is an example of a situation where you were shunned.
Shunned is the act of having ignored someone on purpose, or the act of having been left out and ignored.
- simple past tense and past participle of shun