activate(To make a chart sheet or worksheet the active, or selected, sheet. The sheet that you activate determines which menu bar and toolbars are displayed; To verify that your software product is a legal copy and is installed in compliance with the Microsoft Software License Terms); redeem(Outlook.com Wave 6, Windows Live Shared Controls Wave 6 Rori); trigger(To activate a function or program, such as the release of a virus payload, in response to a specific event, date, or time)