What does 古代 mean?
古代 is a Japanese noun meaning “ancient times” in English. It is written as 古代 in kanji, こだい in hiragana, and kodai in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
古代インカの時代に、アメリカ大陸でもっとも大きい都市であった。
In the days of the ancient Incas, it was the largest city in America.