I want to work overseas in the future.
After having worked in the insurance industry for eight years, I went to America to study abroad.
I want to live somewhere overseas, but I hate traveling.
The outside of the sea is someplace overseas. It can also be foreign or abroad if those words are easier to remember for you.
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.