This is the 8287th most frequent Russian word.
международный
International.
In this sentence, "международная" (international) is used as an adjective modifying "конференция" (conference), indicating its global or multilateral scope.
Международная конференция состоится в следующем месяце.
The international conference will take place next month.
Here, "международной" (international) describes the company as having diverse operations or connections worldwide.
Я работаю в международной компании.
I work at an international company.
The word "международные" modifies "отношения" (relations), highlighting its focus on interactions between nations or countries.