overseas

There's no trick to the meaning of overseas. If someone goes overseas, they've gone "over" the "seas" — to a foreign country.

When overseas came into use, there were no airplanes, so technically speaking, one traveled "across" or "on" the seas, in a ship. Nevertheless, one was thought to have made it "over the sea," hence overseas. When traveling overseas, make sure your phone works on the network in the country where you're headed. Also, the laws and customs overseas can be very different from the ones we have here, so be careful. What here at home you consider small potatoes legally might be a big deal overseas.

Definitions of overseas
1

adv beyond or across the sea

“He lived overseas for many years”
Synonyms:
oversea

adv in a place across an ocean

Synonyms:
abroad

adj in a foreign country

overseas markets”
Synonyms:
abroad
foreign
of concern to or concerning the affairs of other nations (other than your own)

adj being or passing over or across the sea

“some overseas trade in grain arose”
Synonyms:
oversea
marine
relating to or characteristic of or occurring on or in the sea

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