[, ] (BrE alsoˌrolling ˈlaunch []) () an occasion when a company introduces or starts to use a new product, service or technology by gradually making it available to more people （新产品、服务或技术的）推出，初次公开展出◆They will begin the roll-out of their new product next July. 他们将於明年七月开始推出新产品。◆increased demand for broadband roll-out 对宽带需求的增长