くう
Meanings
Adjective (な)
Adjective (の)
Noun
1. fictitious; imaginary; fanciful; fabricated
when read as "かくう"
Pre-noun adjective
2. aerial; overhead
Kanji used
framework
empty air
Examples (2 in total)
All the events described in this story are imaginary.
You say Nessie is an imaginary being, but I think she exists.