This is the 3992nd most frequent Japanese word.
ダミー
"ダミー" means "dummy" or "placeholder."
The word "ダミー" is used here to indicate something that is a placeholder or not real.
このドキュメントはダミーの内容が含まれています。
This document contains dummy content.
In this context, "ダミー" refers to data that is fake yet appropriate for testing purposes.
実験のためにダミーデータを使います。
We use dummy data for the experiment.
Here, "ダミー" means an object or model used to simulate or represent something else.