This is the 281st most frequent Chinese word.
国
"Country" or "nation."
"国" refers to a country or nation in this context.
中国是一个有悠久历史的国家。
China is a country with a long history.
"国" means "the entire country" here, emphasizing national-scale events.
全国人民都在庆祝这个节日。
The people of the whole nation are celebrating this festival.
"国" is used to denote a specific country being represented.