Bat-Signal

Noun

idiomatic informal

(idiomatic, informal) A thing which serves to attract or summon something.

Japanese Meaning

（比喩的）何かまたは誰かを呼び出す、誘い出すための目印や合図

When the neighborhood watch tweeted about a suspicious van, his post became the Bat-Signal that summoned half the block.

近所の見守り隊が不審なバンについてツイートすると、彼の投稿は近所の半分を呼び寄せる合図になった。

Sense（1）

(idiomatic, informal) A thing which serves to attract or summon something.

Bat-Signals

（ plural ）