1. The commencement of an event, activity, or process at the scheduled or expected time without delay
The project manager ensured an on-time start for the construction work.
O gerente de projeto garantiu um início pontual para o trabalho de construção.
2. In sports and events, the beginning of a competition or match at the designated time
We had an on-time start for the championship game despite the weather concerns.
Tivemos um início pontual para o jogo do campeonato apesar das preocupações climáticas.