We haven’t gone to other countries yet.
This is my first time making an overseas call.
I wouldn’t mind being a celebrity if I was in a foreign country.
An outside country is one outside of your own country. That is a foreign country, other countries, or overseas.
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.