1Not actually existing, but invented or imagined — often used for fictional characters, organizations, or events in novels and films.
この小説に登場する町はすべて架空のものだ。
All the towns that appear in this novel are fictitious.
詐欺グループは架空の会社名を使って投資を持ちかけた。
The fraud group used a fictitious company name to solicit investments.
架空請求のはがきが届いても、絶対に振り込んではいけない。
Even if you receive a postcard demanding fictitious payment, you must never transfer money.
映画の脚本家は架空の人物にリアリティを持たせるのが得意だ。
The screenwriter is skilled at making fictional characters feel real.
2Erected or strung through the air rather than underground — used for things like power lines strung overhead.
この地域では電線が架空で張られているため、台風で切れることがある。
In this area, since the power lines are strung overhead, they sometimes snap during typhoons.
新しい鉄道路線の一部は架空のケーブルで電力を供給する。
Part of the new railway line supplies power through overhead cables.