Second Floor
Floor Two, Second Story
noun
The two floor is the second floor. In Japan, that means the floor above the ground floor. Going up!
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.
二階に住む人が大声で何かを言ってるのが聞こえます。
You can hear people on the second floor saying something loud.
歯医者さんなら、このビルの二階にあります。
If you are looking for the dentist, it is on the second floor of this building.
二階はベッドルームで、あとは全部一階にあります。
The second floor has bedrooms, and the rest is on the first floor.