Perfect Score
noun, の adjective
Full points are when you get a perfect score.
満点 can also be used to describe a state of being at the pinnacle of a certain quality or standard, such as サービス満点 (excellent service) or 栄養満点 (highly nutritious).
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
満点をとったら、先生に花丸をもらえるの。
When I get a perfect score, my teacher draws a flower on the paper.