Antonyms for the word "ante-date" include "post-date," "afterdate," "later date," "chrono-date," "future date," and "timeframe." These words describe the opposite of the meaning of the term "ante-date," which means to pre-date or give an earlier date than the actual date. When something is post-dated, it means it has a later date, or a date that comes after the actual date. Similarly, afterdate refers to a date that comes after another date, while later date signifies a date that is further in the future compared to the actual date. Chrono-date refers to the precise dating of events or things, while a timeframe signifies a period within which something occurs.