1. Third person singular present indicative of 'cancelar' in the reflexive form, or impersonal construction meaning 'it is canceled' or 'one cancels'
The event cancels itself due to lack of interest.
O evento cancela-se por falta de interesse.
2. Passive voice construction indicating that something is being canceled or annulled
The reservation cancels at the last minute.
A reserva cancela-se no último minuto.