The difference between Foreign and Overseas

When used as adjectives, foreign means located outside a country or place, especially one's own, whereas overseas means abroad.

Foreign is also noun with the meaning: a foreigner: a person from another country.

Overseas is also adverb with the meaning: abroad.

check bellow for the other definitions of Foreign and Overseas

Foreign as an adjective:

Located outside a country or place, especially one's own.

Examples:

"foreign markets''; ''foreign soil"

"He liked visiting foreign cities."
Foreign as an adjective:

Originating from, characteristic of, belonging to, or being a citizen of a country or place other than the one under discussion.

Examples:

"foreign car''; ''foreign word''; ''foreign citizen''; ''foreign trade"

"There are many more foreign students in Europe since the Erasmus scheme started."
Foreign as an adjective:

Relating to a different nation.

Examples:

"foreign policy''; ''foreign navies"
Foreign as an adjective:

Not characteristic of or naturally taken in by an organism or system.

Examples:

"foreign body''; ''foreign substance''; ''foreign gene''; ''foreign species"
Foreign as an adjective (with ''to'', formerly with ''from''):

Alien; strange.

Examples:

"It was completely foreign to their way of thinking."
Foreign as an adjective (obsolete):

Held at a distance; excluded; exiled.
Foreign as an adjective (US, state, _, legal):

From a different one of the states of the United States, as of a state of residence or incorporation.
Foreign as an adjective:

Belonging to a different organization, company etc.

Examples:

"My bank charges me $2.50 every time I use a foreign ATM."
Foreign as an adjective:

Outside, outdoors, outdoor.

Foreign as a noun:

A foreign person, particularly: A foreigner: a person from another country. An outsider: a person from another place or group. A non-guildmember.
Foreign as a noun (obsolete):

A foreign ship.
Foreign as a noun:

an outhouse.
Foreign as a noun:

A foreign area, particularly: An area of a community that lies outside the legal town or parish limits. An area of a monastery outside its legal limits or serving as an outer court.
Foreign as a noun:

Short for various phrases, including foreign language, foreign parts, and foreign service.

Overseas as an adjective:

Abroad.

Examples:

"Overseas branches of the company are doing well."
Overseas as an adjective (used with ethnicities, nationalities, or religious affiliations):

Living (being resident) in a foreign country.

Examples:

"Overseas Chinese communities exist in North and South America."
Overseas as an adjective:

Across a sea; to or in an area across a sea.

Examples:

"Her overseas trip went well."

Overseas as an adverb:

Abroad.

Examples:

"He emigrated and now lives overseas."
Overseas as an adverb:

Across a sea; to an area across a sea.

Examples:

"She travelled overseas."