Only people 18 or older can watch this movie.
That's all for the paperwork.
People who are 100 years old or older must wear bras.
Compared with this, it's more. That's another way to say that what you have is more than it. That's all. ;)
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.