What does 年代 mean?
年代 is a Japanese noun meaning “age, era, period” in English. It is written as 年代 in kanji, ねんだい in hiragana, and nendai in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
１９９０年代は湾岸戦争で始まった。
The 1990s began with the Gulf War.