lift the curtain (on something)

lift the curtain (on something)

1. To begin or commence (something). It's time to lift the curtain on this new project, everyone, so let's not waste any time! After a few delays, the construction crew was finally ready to lift the curtain.
2. To make (something) publicly known; to reveal or disclose the details or truth (about something). In an attempt to head off a public relations disaster regarding his drug use as a college student, the governor decided to lift the curtain at a press conference. I think we had better lift the curtain on our privacy policy if we want consumers to feel secure buying our software.
See also: curtain, lift