1. to change or modify the conclusion or final part of something, such as a story, film, or narrative
The director decided to alter the ending of the movie to make it more satisfying.
O diretor decidiu alterar o final do filme para torná-lo mais satisfatório.
2. to revise the outcome or conclusion of an event or situation
We need to alter the ending of our presentation to include the new findings.
Precisamos mudar o desfecho da nossa apresentação para incluir as novas descobertas.