overseas
Synonym discussion
Sense: adjective/1
For sense 1, overseas often describes people, offices, study, travel, or trade connected with another country. Foreign is broader and can describe anything not from your own country, so it sometimes sounds less specific than overseas. International usually points to activity involving two or more countries working together, not simply being in one other country. Offshore can overlap in business English, but it often suggests finance, tax arrangements, or sea-based location. Cross-border is common in law, trade, and transport, especially when an actual border is important. You can say an overseas branch in Bangkok or overseas students on campus, but an international team or cross-border payment.
Etymology
Overseas is a modern English compound formed from over and sea. It first pointed to places or movement on the far side of the sea from one's own country, then widened to the more general idea of being in or connected with another country.