- at some time not known or specified
- at some unspecified time in the future
- former; erstwhile: her sometime friend
- merely occasional; sporadic: his wit is a sometime thing
An example of sometime used as an adjective is in the phrase "sometime friend," which means a person who does not always act like a true friend.
An example of sometime used as an adverb is in the sentence, "The game will start sometime," which means the the start time of the game is unknown.
Usage Note: Since the 15th century people have used sometime as an adjective to mean “former,” as in our sometime colleague. Since the 1930s people have also used it to mean “occasional,” as in Duquette decided to trade Everett, the team's sometime star and sometime problem child. Evidence suggests that this usage is now standard. In 1975, a majority of the Usage Panel found this “occasional” use unacceptable, but in our 2002 survey, 70 percent accepted the example quoted above. The adverbial use of sometime meaning “occasionally,” however, was not met with much favor. Only 19 percent accepted the sentence The website is intended to help you navigate through the sometime confusing maze of government regulations. In such instances, where an adjective (and not a noun) is being modified, use sometimes instead. See Usage Note at someday.