"Became definite" can be substituted with a variety of synonyms, depending on the context in which it is used. Some options include "settled," "confirmed," "established," "determined," "concluded," or "resolved." These words all convey a sense of finality or certainty, suggesting that a decision has been made or a situation has been clarified. Other possibilities might include "fixed," "unchanging," "decided," or "clear-cut." Using synonyms can help to add variety and nuance to your writing, ensuring that your meaning is conveyed accurately and effectively.