The amount of time between when you ask a someone out on a date and when you receive an answer. Actually there isn’t a set amount of time attributed to the word eon. Most dictionaries define it as a indeterminately long amount of time or something to that effect. The phrase is used in geologic time scales to mean a vast amount of time. Since geologic dating is wildly imprecise, many of the terms used in connection with it are equally imprecise.