soft launch

Aeronautics, Aerospace, Business, Engineering, Natural sciences, Physical sciences The launch of a missile in such a way that the rocket motor ignites outside of the launch tube, ejecting the missile non-explosively.

Business, Marketing The release of a product or service (particularly software) to a limited audience, often in order to gain data on the product's usage and acceptance by customers.

Internet, Informal The subtle or ambiguous announcement of a romantic relationship, often via social media.