What does 多大 mean?
多大 is a Japanese adjective meaning “great (quantity, amount, etc.); huge; enormous; serious” in English. It is written as 多大 in kanji, ただい in hiragana, and tadai in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
台風は多大の被害を与えた。
The typhoon has done much harm.