What is the phrase that best defines the term 'come to an end'?

The phrase that best defines 'come to an end' is 'cease.' This term directly implies a stopping point or termination of an activity or process. When something ceases, it indicates that it has concluded and will no longer continue.

In contrast, 'resume' suggests starting something again after a pause, which is contrary to the concept of ending. 'Continue' implies ongoing action without a stoppage, while 'initiate' means to begin something, which is also opposite to the idea of something coming to an end. Thus, 'cease' is the most accurate representation of the phrase in question, capturing the essence of concluding or stopping something.