What does 大国 mean?
大国 is a Japanese noun meaning “large country; major nation; great power” in English. It can also be translated as “province of the highest rank (ritsuryō system)” depending on context. It is written as 大国 in kanji, たいこく in hiragana, and taikoku in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
その小国は隣の大国に併合された。
The small country was annexed to its larger neighbor.