1. To complete a task, project, or assignment before the agreed-upon deadline or expected time
The construction team managed to finish the project ahead of schedule.
A equipe de construção conseguiu concluir o projeto antes do prazo.
2. To accomplish something in less time than anticipated
She completed her thesis ahead of schedule, impressing her advisors.
Ela concluiu sua tese antes do prazo, impressionando seus orientadores.