1. A formal ceremony or event that marks the official beginning or opening of something, particularly the first official act of a newly elected official or the opening of a new institution
The president's inaugural act was to sign an executive order.
O ato inaugural do presidente foi assinar um decreto executivo.
2. The ceremonial first action taken by someone assuming office or position
The mayor's inaugural act included cutting the ribbon at the new community center.
O ato inaugural do prefeito incluiu cortar a fita do novo centro comunitário.