This is the 2094th most frequent Japanese word.
国内外
"Domestic and international."
In this sentence, '国内外' is used as a noun to indicate 'both domestically and internationally', referring to the locations of the news sources.
国内外のニュースを毎日チェックしています。
I check the news from both within and outside the country daily.
Here, '国内外' again functions as a noun describing the geographical scope of the participating companies.
国内外の企業がこの展示会に参加しています。
Companies from within and outside the country are participating in this exhibition.
In this example, '国内外' describes the extent of the movie's popularity, showing its appeal in domestic and international contexts.