What does 架空 mean?
架空 is a Japanese noun meaning “imaginary”, “fiction” or “fanciful” in English. It can also be translated as “aerial” depending on context. It is written as 架空 in kanji, かくう in hiragana, and kakuu in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
あなたは本当に幽霊を見たのではない。それは架空のものでしかなかったのだ。
You didn't really see a ghost―it was only imaginary.