in the making

Prepositional phrase

idiomatic

(idiomatic) In development; in the process of being made or evolving.

Japanese Meaning

制作中 / 開発中 / 作成途中 / 発展途上

A groundbreaking product is in the making at the company's labs.

その会社の研究所では画期的な製品が開発中だ。

Sense（1）

(idiomatic) In development; in the process of being made or evolving.

You're witnessing a great reference work in the making.