IPA: /ˈwʌnˌtaɪm/
KK: /ˈwʌnˌtaɪm/
Describing something that happens only one time or at a single occasion.
The onetime event attracted a lot of attention from the media.
Onetime is formed from "one" (meaning a single unit) and "time" (meaning a period or duration). The word "onetime" refers to something that occurs only once in a specific time frame.
Think of 'one' as a single occurrence in a specific 'time' — that's why onetime means something that happens just once.