Unveil is a dramatic verb we use when we uncover or reveal something for the first time, often in front of a large gathering or as part of a publicity campaign.
A city's mayor might unveil a new monument by removing an actual veil (cloth covering) from it. This is often done with great flourish and accompanied by a drum roll. In a more metaphorical sense, a software company might unveil — that is, publicly announce — a new video game or business application.
