internationalist

A student, expounder, or upholder of international law.

[capitalized] A member of or a believer in the International.

An upholder of internationalism, in either sense.

One who is versed in the principles of international law.

A member of the International; one who believes in, or advocates the doctrines of, the International.

Of or pertaining to internationalism

An advocate of internationalism

A player representing their country in a team sport (particularly used in Scotland)

a member of a socialist or communist international

an advocate of internationalism