1. A formal event held to introduce and present a new product, service, project, or initiative to the public or media
The company held a launch ceremony for their new smartphone at a convention center.
A empresa realizou uma cerimônia de lançamento para seu novo smartphone em um centro de convenções.
2. An official event marking the beginning of operation of a new vessel, building, or infrastructure project
The ship's launch ceremony was attended by government officials and dignitaries.
A cerimônia de lançamento do navio foi frequentada por autoridades governamentais e personalidades.